Environmental problems of technology of inorganic substances (500)

Айдана красавица

1. An aim of affinage:

А) preparation of metal in the pure state

В) separation of metals having the similar properties

С) alloys production

D) purification of metals from mechanical impurities

Е) mercury stripping after amalgam preparation

2. A purpose of a concentration process:

А) increasing of a useful component content

В) minerals’ opening

С) separation of ore particles according to their sizes

D) raw material purification from impurity

Е) production of high purity metals

3. A main component of copper-electrolytic slimes:

А) Cu

В) Au

С) Pb

D) Se

Е) Te

4. A general feature of all rare metals:

А) novelty of their application in technics

В) position in the Mendeleev periodic table

С) physical properties

D) small occurrence in nature

Е) chemical properties

5. Which group of metals doesn’t concern to rare metals?

А) ferrous metals

В) refractory metals

С) trace rare metals

D) radioactive metals

Е) rare earth metals

6. A characteristic feature of refractory rare metals:

А) high melting point

В) low density

С) don’t form intermetallic compounds

D) don’t cooperate with nonmetals

E) low melting point

7. Kazakhstan phosphorite deposits can be related to …

A) sedimentary

B) volcanic

C) basaltic

D) granite

E) pebbly

8. How many minerals are mined in Kazakhstan?

A) 39

B) 49

C) 59

D) 69

E) 29

9. What place in the world does Kazakhstan take on a number of mined useful minerals?

A) 6

B) 5

C) 8

D) 12

E) 3

10. What country mines the biggest number of minerals?

A) Russia

B) China

C) Kazakhstan

D) the USA

E) Australia

11. Kazakhstan ranks the first place on stocks of the following metals:

A) V, W, Zn

B) W, P, Pb

C) Mo, Si, Al

D) C, Cu, Re

E) Ba, Cd, As

12. Kazakhstan ranks the second place on stocks of the following metals:

A) U, Cr

B) V, Mo

C) Zn, Cu

D) Mn, Ca

E)Ba, Si

13. Kazakhstan ranks the third place on stocks of the following metals:

A) Mn, Re, Ba

B) Al, P, Si

C) Pb, Cu, Ti

D) Sn, Cd, Be

E) Ta, Ag, Ba

14. Kazakhstan is the largest producer of …:

A) Re

B) Bi

C) Mg

D) Ni

E) P

15. Where are situated basic Kazakhstan iron stocks?

A) Karaganda and Kustanay regions

B) East Kazakhstan and Pavlodar regions

C) South Kazakhstan and Kzyl-Orda regions

D) Aktyubinsk and Atyrau regions

E) Dzhambul and Almaty regions

16. Ushtas, Koksu, Aksai, Kokdzhon – are the deposits containing …

A) phosphorites

B) bauxites

C) asbestos

D) sodium salts

E) barite

17. The ores, in which content of a valuable component in a kind of a sulphide-free mineral does not exceed 10 % from the total ore mass, are called …

A) sulphide ores

B) mixed ores

C) oxidized ores

D) sulphate ores

E) sulphite ores

18. The ores, which contain 80-90 % of non-ferrous metals in sulphide minerals and 10-20 % - in oxidized forms are named …

A) mixed ores

B) sulphite ores

C) sulphate ores

D) phosphate ores

E) carbonate ores

19. The ores in which content of oxidized forms of metals is above 20 % are called …

A) oxidized ores

B) mixed ores

C) sulphate ores

D) sulphite ores

E) phosphate ores

20. Reasons for low degree of processing phosphogypsum:

A) presence of F, P, rare-earth elements, radioactive metals

B) presence of big amount of water

C) presence of SiO₂ and Fe₂O₃

D) presence of big amount of sulphur

E) presence of residues of sulphuric and phosphoric acids

21. Basic reasons, which do not allow using phosphoric slags for manufacture of Portland cement:

A) release of toxic gases

B) radioactivity of the cement obtained

C) high flow ability of the cement

D) low quality of the cement

E) high hygroscopicity of the cement

22. Pyrite cinder is a valuable secondary raw material because it contains …

A) non-ferrous metals

B) sulphur

C) fluorine

D) radioactive elements

E) phosphorus

23. Extraction degree of phosphorus from phosphorite at manufacture of wet-process phosphoric acid:

A) 98 %

B) 88 %

C) 70 %

D) 90 %

E) 95 %

24. A share of balance phosphorite ores in the Karatau deposit:

A) 60 %

B) 70 %

C) 80 %

D) 90 %

E) 50 %

25. A chemical concentration process:

A) chloridizing roasting

B) grinding

C) crystallization

D) dissolution

E) screening

26. A chemical concentration process:

A) reduction

B) melting

C) boiling

D) drying

E) evaporation

27. A chemical concentration process:

A) oxidation

B) crushing

C) washing

D) melting

E) sublimation

28. Porous solids adsorbing gases and vapours are called ….

A) adsorbents

B) solvents

C) reagents

D) chemicals

E) leaching agents

29. It should be kept in mind that … is very poisonous.

A) white phosphorus

B) sodium chloride

C) silicon dioxide

D) water steam

E) potassium nitrate

30. Decomposition of substances under action of electrical current is called as ….

A) electrolysis

B) dissolution

C) electrolytic dissociation

D) melting

E) refining

31. The most important industrial way of sodium hydroxide production is ….

A) electrolysis of sodium chloride solution

B) interaction of sodium metal with water

C) decomposition of sodium salts

D) interaction of sodium salts with potassium hydroxide

E) electrolysis of the table salt melt

32. Metals concerning to the ferrous metal group:

A) Fe, Cr, Mn, V

B) Fe, W, Mo, Ti

C) Cu, Fe, Zn

D) Ni, Cu, Zn

E) Na, K, Ca

33. Metals concerning to the non-ferrous metal group:

A) Ni, Zn, Cu

B) Cu, Fe, Cr

C) Zn, Cu, Pb

D) In, Tl, Ge

E) W, Ti, Mo

34. Which substances are used for reduction of metals from metal oxides?

A) C, CH₄, CO

B) C, CO, CO₂

C) H₂, Cl₂, F₂

D) C, S, O₂

E) CO, CO₂, SO₂

35. Which substances are used for reduction of metals from metal oxides?

A) Al, H₂, Mg, CO

B) Al, Cl₂, Be, CO₂

C) C, CH₄,Be, Ca

D) H₂, O₂, N₂ , F₂

E) C, H₂, CO, CO₂

36. The basic mineral used for sulphuric acid production:

A) iron pyrite

B) sodium chloride

C) phosphorite

D) potassium sulphate

E) phosphogypsum

37. A waste product of soda ash production:

A) distiller liquid

B) mercury-containing gases

C) phosphogypsum

D) cottrel milk

E) pyrite cinder

38. A waste product of sulphuric acid manufacture:

A) pyrite cinder

B) distiller liquid

C) gases containing of nitrogen oxides

D) mercury-containing waste water

E) phosphogypsum

39. Mineral raw material for soda ash production:

A) sodium chloride

B) phosphates

C) sodium sulphate

D) iron pyrite

E) sulphuric acid

40. A way of pure caustic soda production:

A) electrolysis with a mercury cathode

B) roasting of sulphur-containing materials

C) decomposition of natural phosphates

D) roasting of carbonate raw material

E) reduction of phosphorites with carbon

41. A waste product of the wet-process phosphoric acid manufacture:

A) phosphogypsum

B) pyrite cinder

C) cottrel milk

D) distiller liquid

E) selenium slime

42. A waste product of sulphuric acid manufacture:

A) sulphur-containing gases

B) phosphogypsum

C) cottrel milk

D) distiller liquid

E) mercury-containing gases

43. The industrial way of sulphuric acid manufacture consists of ___ stages.

A) 3

B) 4

C) 5

D) 1

E) 2

44. The first stage of sulphuric acid production:

A) roasting of the sulphur-containing raw material

B) decomposition of the natural phosphate

C) oxidation of SO₂ into SO₃ by oxygen

D) electrolysis of the sodium chloride solution

E) evaporation of the diluted solution

45. The extractive way of the wet-process phosphoric acid production:

A) decomposition of natural phosphates by sulphuric acid

B) electrolysis of the sodium chloride solution

C) roasting of the sulphide raw material

D) reduction of phosphorites by carbon

E) sublimation of phosphorus

46. A chemical formula of iron pyrite:

A) FeS₂

B) FeSO₄

C) CuFeS₂

D) H₂S

E) FeS

47. A principal method of sodium hydroxide production:

A) electrolysis of aqueous solutions of sodium chloride

B) electrolysis of the melt of sodium chloride

C) dissolution of sodium salts

D) oxidation of the sodium metal

E) interaction of sodium oxide with water

48. Sodium hydroxide is _____.

A) a white crystalline solid well-soluble in water

B) a transparent liquid

C) yellow needle crystals

D) white crystals weak-soluble in water

E) a gas with unpleasant smell

49. Find the synonym to the word “pollution”:

A) contamination

B) solution

C) sedimentation

D) deposition

E) distillation

50. At heating of carbonate raw material the following process is occurred:

A) decomposition

B) dissolution

C) sublimation

D) oxidation

E) melting

51. A composition of natural gypsum:

A) CaSO₄ ∙ 2H₂O

B) 2CaSO₄ ∙ H₂O

C) 2CaSO₄ ∙ 2H₂O

D) CaSO₄

E) CaSO₄∙MgSO₄

52. Chemical formula of lime:

A) CaO

B) MgO

C) CaCO₃

D) H₂CO₃

E) NaCl

53. Chemical formula of limy milk:

A) Ca(OH)₂

B) CaO

C) Mg(OH)₂

D) CaCO₃

E) Na₂CO₃

54. Chemical formula of limestone:

A) CaCO₃

B) CaO

C) Ca(OH)₂

D) MgO

E) MgCO₃

55. A process of chemical concentration of mineral raw material:

A) oxidizing roasting

B) crystallization
C) jigging
D) concentration in heavy suspensions
E) radiometric concentration

56. A processing way of phosphate fines, which is formed at the mining and subsequent preparation of Karatau phosphorites:

A) agglomeration
B) flotation
C) roasting
D) briquetting
E) segregation

57. Factors preventing from large-scale use of phosphoric slag for cement manufacture:

A) presence of P₂O₅ in the slag
B) presence of rare-earth elements
C) presence of Ni and Mn
D) high sulphur content
E) presence of Cl

58. The lime formed at decomposition of phosphogypsum can be referred to …

A) artificial raw material
B) technogenic raw material
C) heat-treated raw material
D) decarbonized raw material
E) high-quality raw material

59. Fluorine distribution degree into phosphoric acid at extraction processing phosphorites:

A) 90 %
B) 85 %
C) 80 %
D) 75 %
E) 70 %

60. The most probably application area of overburden in Kazakhstan:

A) manufacture of building materials
B) preparation of artificial raw materials
C) in road construction
D) for improvement of soils’ structure
E) for land reclamation

61. Stocks of phosphorites in the Karatau field:

A) 2,6 bn t

B) 2,0 bn t

C) 1,4 bn t

D) 0,8 bn t

E) 3,2 bn t

62. Content of P₂O₅ in the Karatau phosphorites:

A) 19-22 %

B) 16-19 %

C) 13-16 %

D) 10-13 %

E) 7-10 %

63. What kinds of Kazakhstan mineral raw material can be used for sulphuric acid production?

A) pyrite ores, concentration tails of sulphide ores, gases of non-ferrous metallurgy

B) pyrite, phosphorites, alumina, barite

C) barite, pyrite, gypsum, native sulphur, kaolin

D) bauxite, talc, native sulphur, sylvinite, chrysoprase

E) waste gases of ferrous metallurgy, barite, gypsum, coke oven gas

64. The ores containing one valuable metallic component are called:

A) monometallic

B) polymetallic

C) non-metallic

D) alternative

E) off-balance

65. The ores containing two and more valuable components are called:

A) polymetallic

B) monometallic

C) non-metallic

D) alternative

E) off-balance

66. Phosphogypsum is …

A) waste of phosphorite’s decomposition

B) waste of phosphorite’s decomposition by a mixture of HCl and H₂SO₄

C) waste of phosphorite’s decomposition by a mixture of HNO₃and H₂SO₄

D) waste of phosphorite’s decomposition by HNO₃

E) waste of phosphorite’s decomposition by HCl

67. Why the Karatau phosphorites are processed by electrothermal way?

A) low dressability

B) high content of impurities

C) low content of P₂O₅

D) high economic indexes

E) high wastelessness

68. A purpose of mineral raw material crushing and grinding:

A) opening of minerals

B) activation of barren rock

C) obtaining a fine fraction of an ore

D) carrying out modification transitions in minerals

E) improvement of mechanical properties of ores

69. A basic mineral of the Karatau phosphorites is fluorocarbonateapatite. Its formula is …

A) Са₁₀Р₅СО₂₃(F,OH)₃

B) Са₆Р₃СО₂₈(F₂,OH)₆

C) Са₁₂Р₉СО₂₆(F₃,OH₅)₂

D) Са₅Р₈СО₁₈(F,OH₄)₅

E) Са₁₅Р₈СО₂₉(F₂,OH₃)₆

70. Degree of use of barren rocks in Kazakhstan:

A) 11 %

B) 13 %

C) 15 %

D) 17 %

E) 19 %

71. A basic concentration way of non-ferrous metals’ ores is …

A) foam flotation

B) decrepitation

C) pneumatic concentration

D) magnetic separation

E) gravitational concentration

72. The most important minerals containing aluminum:

A) bauxite, alunite, nepheline

B) apatite, phosphorite

C) borax, gypsum

D) pyrite, sulphur

E) chalk, limestone

73. Mineral raw material for manufacture of boric acid and other boron compounds:

A) borax

B) phosphorite

C) apatite

D) nepheline

E) pyrite

74. Sulphur is met in nature as …

A) pyrite, barite, cinnabar

B) galenite, oil, phosphorite

C) phosphorite, coal, alumina

D) apatite, combustible slates

E) antimonite, feldspar

75. Mineral raw material for alumina production:

A) bauxites

B) phosphorites

C) apatites

D) limestone

E) feldspar

76. A share of Kazakhstan tungsten-containing mineral raw material in the world stocks:

A) 83 %

B) 23 %

C) 53 %

D) 42 %

E) 13 %

77. A share of Kazakhstan uranium-containing mineral raw material in the world stocks:

A) 25 %

B) 15 %

C) 10 %

D) 11 %

E) 5 %

78. Potassium-containing minerals are …

A) sylvinite, carnallite

B) chalcedony, quartzite

C) alumina, dolomite

D) phosphorite, apatite

E) pyrite, limonite

79. A fraction with high content of a useful component is called …

A) concentrate

B) tails

C) barren rock

D) slime

E) slag

80. A fraction consisting of dead rock minerals is named …

A) tails

B) concentrate

C) slime

D) sludge

E) slag

81. At complex use of polymetallic sulphide ores we produce different non-ferrous metals and …

A) sulphuric acid, iron oxide

B) phosphoric acid, calcium oxide

C) hydrochloric acid, aluminum oxide

D) nitric acid, sodium oxide

E) hydrofluoric acid, titanium dioxide

82. Natural chromic ore is …

A) chromite

B) dolomite

C) phosphorite

D) apatite

E) nepheline

83. Metals extracted from copper-electrolytic slimes:

A) selenium, tellurium

B) indium, gallium

C) uranium, radium

D) sodium, potassium

E) copper, tin

84. Technogenic waste, which can be used for production of rare-earth elements:

A) phosphogypsum

B) halite waste

C) white slime

D) red slime

E) distiller slime

85. The graduated cylinder is used for measuring of …

A) volumes of liquids

B) the mass of a liquid

C) the concentration of solutions

D) the content of water in a substance

E) the temperature of solutions

86. Raw material for soda ash production:

А) NaCl brine, NH₃, CaCO₃

В) rock salt, Ca(OH)₂

С) table salt, NH₄OH, CaCl₂

D) Na₂CO₃, NH₄OH, CaSO₄

E) NaHCO₃, NH₄Cl, CaCl₂

87. Main sources of NaCl:

А) layers of rock salt, ocean and sea water, lake brines

В) oil sources, drill holes

С) springs, underground holes,

D) artesian wells, distiller liquid, oil wells

Е) atmospheric water, waste water

88. According to a value of material non-waste parameter (MNP) a process is considered as a non-waste process if …

А)MNP ≥ 0,9

В) MNP ≥ 0,8

С) MNP ≥ 0,7

D) MNP ≥ 0,6

Е) MNP ≥ 0,5

89. According to a value of material non-waste parameter (MNP) a process is considered as a low-waste process if …

А) MNP = 0,8-0,9

В) MNP = 0,8-0,4

С) MNP = 0,6-0,7

D) MNP = 0,5-0,6

Е) MNP = 0,4-0,5

90. Minimum content of P₂O₅ in the Karatau phosphorites used for manufacture of wet-process phosphoric acid by sulphuric acid method:

А) 24 %

В) 26 %

С) 28 %

D) 30 %

Е) 32 %

91. To determine content of P₂O₅ and CaO in 100 g of Karatau phosphorite containing 25 % of P₂O₅ and 40 % CaO.

А) 25 g and 40 g

В) 12,5 g and 20 g

С) 23 g and 34 g

D) 15 g and 20 %

Е) 25 % and 20 %

92. To calculate a mass of table salt for manufacture of hydrogen chloride by means of sulphate method, if 100 kg of 93 % H₂SO₄ is used for the decomposition according to the reaction: 2NaCl + H₂SO₄ = Na₂SO₄ + 2НСl

А) 111 kg

В) 141 kg

С) 183 kg

D) 160 kg

Е) 219 kg

93. Calculate a weight of sulphur (99 % of S) for production of 1 tonne of H₂SO₄.

А) 329,82 kg

В) 326,5 kg

С) 323,23 kg

D) 309,8 kg

Е) 313,2 kg

94. Calculate a mass of insoluble residue in 100 g of the Karatau phosphorite containing 20 % of insoluble residue

А) 20 g

В) 15,5 g

С) 80 g

D) 5 g

Е) 120 g

95. Calculate a mass of pyrite (45 % of S) for production of 1 tonne of H₂SO₄.

А) 725,6 kg

В) 326,5 kg

С) 146,92 kg

D) 329,83 kg

Е) 525,6 kg

96. Calculate mass fractions of calcium oxide and magnesium oxide in dolomite:

А) 30,4 % and 21,7 %

В) 50,0 % and 49,9 %

С) 51,1 % and 52,6 %

D) 14,5 % and 28,3 %

Е) 75,8 % and 31,1 %

97. Maximum content of CO₂ in phosphorite at manufacture of wet-process phosphoric acid:

А) 8 %

В) 6 %

С) 4 %

D) 10 %

Е) 2 %

98. The most perspective raw material for manufacture of sulphuric acid:

А) oil sulphur

В) gases of coke-oven batteries

С) native sulphur

D) barite

Е) calcium sulphate

99. What mineral fertilizer can be obtained at phosphoric acid processing of phosphate mineral raw material?

А)double superphosphate

В) simple superphosphate

С) ammoniac saltpeter

D) ammonium sulphate

Е) potash saltpeter

100. What products can be obtained at sulphuric acid processing of phosphate raw material?

А) wet-process phosphoric acid and simple superphosphate

В) dry-process phosphoric acid and double superphosphate

С) sodium tripolyphosphate and precipitate

D) sodium polyphosphate and bone meal

E) complex mineral fertilizers

101. At complex processing of apatite-nepheline ores it is possible to produce the following products:

А) potash, cement, soda ash, aluminum

В) phosphoric acid, cement, gypsum

С) fluoric salts, rare earth elements

D) phosphoric fertilizers, chrome

Е) sulphuric acid, gypsum, cement

102.A main component of pyrite cinder:

A) Fe₂O₃

B) Fe₃O₄

C) FeO

D) Fe(OH)₂

E) Fe(OH)₃

103. Halite wastes are formed at manufacture of...

A) potash fertilizers

B) phosphoric fertilezers

C) nitric fertilizers

D) sulphuric acid

E)caustic soda

104. A main component of halite waste:

A) NaCl

B) KCl

C) Fe₂O₃

D) Fe₂S

E) SiO₂

105. What products can be produced from pyrite cinder?

A) Fe, Cu, Pb, S, Zn

B) rare-earth metals

C) Fe, Ag, Au, Hf

D)Ti, W, V

E) P, F, Zn, Se, Te

106. Physical pollution:

A) radioactive elements

B) pesticides

C) fluorine compounds

D) organic substances

E) sulphur oxides

107. Physical pollution:

A) thermal pollution (temperature growth)

B) nitrogen oxides

C) fluorine-containing compounds

D) solid impurities

E) pesticides and other synthetic compounds

108. Physical pollution:

A) noise and infrasound

B) sulphur-containing gases

C) heavy metals

D) solid substances

E) synthetic detergents

109. Chemical pollution:

A) nitrogen oxides

B) noise

C) thermal pollution

D) infrasound

E) radioactive elements

110. Chemical pollution:

A) synthetic detergents

B) radioactive metals

C) noise

D) increase in temperature

E) low-frequency vibrations

111. In accordance with formation conditions all pollutants are divided on…

A) natural and artificial

B) physical and chemical

C) harmful and harmless

D) solid and liquid

E) harmful and useful

112. A source of natural pollutions:

A) forest fires

B) nuclear explosions

C) thermal power stations

D) water heating systems

E) burning waste products

113. A source of natural pollutions:

A) volcanic activity

B) burning of industrial waste

C) fuel combustion

D) energy stations

E) cars

114. A source of natural pollutions:

A) combustion of meteorites

B) cars

C) combustion of household waste

D) heating systems

E) nuclear explosions

115. A source of natural pollutions:

A) aeration of soils and rocks

B) power stations

C) chemical enterprises

D) metallurgical plants

E) cars

116. A source of anthropogenous pollutions:

A) chemical plants

B) forest fires

C) volcanoes

D) soil aeration

E) dying off plants

117. A source of anthropogenous pollutions:

A) thermal power stations

B) aeration of rocks

C) volcanic activity

D) sea roughness

E) combustion of meteorites

118.A main parameter, which defines pollution:

A) a dose

B) aggregate state

C) a size of a particle

D) its origin

E) chemical nature

119. Basic pollutants of the atmosphere:

A) carbon, sulphur and nitrogen compounds

B) heavy metals

C) carbon dioxide

D) ozone

E) ammonia

120. What gas plays an important role in the greenhouse effect?

A) carbon dioxide

B) carbon monoxide

C) ammonia

D) ozone

E) nitrogen

121.The most widespread atmosphere pollutant:

A) carbon oxide

B) carbon dioxide

C) ozone

D) nitrogen oxide

E) fluorine

122. A basic source of carbon monoxide:

A) internal combustion engines

B) forest fires

C) coal combustion

D) burning household waste

E) chemical plants

123. Basic sulphur compounds, which pollute the atmosphere:

A) SO₂, H₂S

B) SO₂, SO₃

C) H₂SO₄

D) metal sulphides

E) FeS₂

124. 80-90 % of all the anthropogenous sulphurous gas (SO₂) is formed at …

A) fuel combustion

B) volcanic activity

C) sulphuric acid production

D) forest fires

E) manufacture of mineral fertilizers

125.This gas is poisonous, irritates respiratory tracts, causes cough.

A) SO₂

B) CO₂

C) CO

D) O₃

E) N₂

126.Fresh water reserves suitable for use including river, lake and underground water makes…

A) 0,3 % from the hydrosphere volume

B) 5 % from the hydrosphere volume

C) 12 % from the hydrosphere volume

D) 0,7 % from the hydrosphere volume

E) 7 % from the hydrosphere volume

127. In accordance of mineralization degree water is subdivided on … groups.

A) 4

B) 5

C) 6

D) 7

E) 8

128. A main sours of lead in the atmosphere:

A) automobile emissions

B) forest fires

C) volcanoes

D) chemical industry

E) waste gases of power stations

129. Particulate pollutants can be:

A) solid and liquid particles

B) liquid and gaseous substances

C) amorphous and crystalline particles

D) harmful and harmless

E) physical and chemical

130. Dust removal processes and equipment primarily depends on such a property of the dust as …

A) density

B) solubility

C) oxidizing properties

D) hardness

E) magnetic susceptibility

131. Chemical nature of a substance is a determining factor at removal of …. pollutants

A) gaseous

B) solid

C) crystalline

D) amorphous

E) dissolved

132. An apparatus for preliminary cleaning gases

A) dust precipitation chamber

B) packed column

C) fibrous filter

D) absorption installation

E) adsorption installation

133. An apparatus for preliminary cleaning gases

A) inertia-type deduster

B) fibrous filter

C) adsorption unit

D) burning chamber

E) absorption plant

134. Dust precipitation chambers are based on action of …

A) gravitational force

B) inertia force

C) centrifugal force

D) adsorption force

E) absorption force

135. Operating principle of cyclones is action of …

A) centrifugal forces

B) gravitational forces

C) inertia forces

D) adsorption forces

E) absorption forces

136. Gas speed in dust precipitation chambers should be not higher …

A) 3 m/s

B) 8 m/s

C) 12 m/s

D) 10 m/s

E) 1 m/s

137. A main disadvantage of dust precipitation chambers is

A) bulkiness

B) high power consumption

C) high cost

D) complex arrangement

E) impossibility of catching abrasive dust

138. Centrifugal force

A) increases with decrease of a cyclone radius

B) does not depend on a radius of particles’ rotation

C) decreases with decrease of a cyclone radius

D) increases with increase of a cyclone radius

E) at first increases with decrease of a cyclone radius, and then growths

139. A multicyclone is

A) a few cyclones united in one a unit

B) a very small cyclone

C) a cyclone for catching fine-dispersed particles

D) a cyclone, which operates at low temperatures

E) a cyclone for catching abrasive dust

140. First of all, use of water spraying prevent …

A) secondary dust carry-over

B) formation of waste water

C) limit of a gas stream speed

D) high energy expenses

E) large sizes of an apparatus

141. Fibrous filter are applied for

A) removal of dust from gas streams

B) catching gaseous pollutants from gas streams

C) removal of dissolved organic substances

D) filtration of solutions and emulsions

E) removal of suspended particles from solutions

142. Materials used for making fibrous filters:

A) cellulose

B) activated coal

C) sand

D) peat treated with acids

E) siliceous compounds

143. Fibrous filters of special purpose are applied for …

A) work at high temperatures (> 400^oC)

B) filtering high-dispersed particles

C) removal of fluoric compounds

D) filtration of waste gases of melting processes

E) removal of dust from gas streams

144. Filters intended for work at high temperatures are made from …

A) glass

B) cellulose

C) cotton

D) metal

E) polypropylene

145. Filters used for deactivation of gaseous radioactive waste are made from …

A) glass and asbestos fibres

B) metal fibres

C) silk fibres

D) cellulose fibres

E) polyamide fibres

146. Fine dust particles get electric charge, move to a grounded electrode, stick to it and unload. What apparatus is described?

A) electrostatic precipitator

B) dust precipitation chamber

C) Venturi scrubber

D) packed column

E) absorption unit

147. Methods of removal of gaseous components from waste gases:

A) absorption with a liquid

B) filtration through a fabric filter

C) dust precipitation

D) use of cyclones

E) electric precipitator

148. Absorption – is a process of …

A) dissolution of a gas in a liquid

B) separation of liquids

C) dry gas purification

D) inertial dust sedimentation

E) catalytic burning of waste gases

149. Adsorption - is a process…

A) catching of gases by solid substances

B) separation of liquids

C) catalytic oxidation

D) dissolution of a gas in a liquid

E) dust precipitation

150. An adsorbing solid substance is …

A) adsorbent

B) adsorbate

C) absorbent

D) oxidizer

E) reducer

151. An adsorbent should has …

A) high porosity

B) high density

C) fragility

D) good solubility in water

E) good electro conductivity

152. An adsorbent

A) activated carbon

B) aluminum metal

C) water

D) sulphuric acid

E) calcium carbonate

153. An adsorbent

A) synthetic zeolites

B) pure metals

C) hydrogen sulphide

D) nitric acid

E) marble

154. Burning is

A) oxidation process

B) reduction process

C) physical process

D) adsorption process

E) absorption process

155. Mechanical method of waste water purification:

A) clarification

B) neutralization

C) freezing

D) distillation

E) electrolysis

156. The most widespread non-polar adsorbent:

A) coal

B) aluminosilicates

C) metal oxides

D) bauxites

E) alumina

157. In accordance with mineralization degree there are _____ types of water.

A) 4

B) 5

C) 6

D) 7

E) 8

158. Water relevant to the first mineralization type is

A) low-mineralized water

B) average-mineralized water

C) raised-mineralization water

D) high-mineralization water

E) non=mineralized water

159. High-toxic water contains such components as …

A) heavy metals

B) sodium salts

C) sand

D) clay

E) suspended particles

160. Organoleptic parameter for describing of water quality:

A) colour

B) density

C) content of heavy metals

D) oxidability

E) electric conductivity

161. Organoleptic parameter for describing of water quality:

A) transparency

B) temperature

C) content of suspended substances

D) content of dissolved substances

E) surface tension

162. Organoleptic parameter for describing of water quality:

A) smell

B) content of dissolved substances

C) surface tension

D) electrical conductivity

E) content of “organic” carbon

163. Mechanical method of waste water purification from suspensions and emulsions:

A) clarification

B) combustion

C) ion exchange

D) distillation

E) coagulation

164. Mechanical method of waste water purification from suspensions and emulsions:

A) filtration

B) rectification

C) ion exchange

D) flocculation

E) distillation

165. Physicochemical method of waste water purification from suspensions and emulsions:

A) coagulation

B) burning

C) filtration

D) settling

E) clarification

166. Solid waste product:

A) dust

B) waste water

C) mother liquor

D) slime

E) pulp

167. Solid waste product:

A) concentration tails

B) sludge

C) slime

D) reactionary water

E) kiln gas

168. Which kind of waste does not concern to solid waste?

A) slime

B) dust

C) cinder

D) ash

E) powder

169. Which kind of waste does not concern to solid waste?

A) sludge

B) ash

C) organic residue

D) soot

E) cinder

170. Raw material for soda ash manufacture:

A) sodium chloride, ammonia

B) sodium sulphate, ammonia

C) sodium chloride, nitric acid

D) ammonia, sulphuric acid

E) iron pyrite, sulphuric acid

171. Distiller slime is …

A) a waste product of soda ash production

B) raw material for soda ash manufacture

C) a waste product of caustic soda production

D) a by-product of mineral fertilizer production

E) a waste product of sulphuric acid manufacture

172. Distiller slime is formed on a stage of …

A) ammonia regeneration

B) crude brine purification

C) sodium hydrocarbonate calcination

D) limy milk preparation

E) ammoniated brine carbonization

173. Distiller slime is …

A) a suspension of insoluble products

B) solid residue after calcination

C) acid waste water

D) mercury-containing sludge

E) lime fines

174. Limy fines is a waste product of soda ash manufacture. On which stage it is formed?

A) preparation of calcium carbonate for roasting

B) purification of crude sodium chloride brine

C) filtration of sodium bicarbonate suspension

D) ammonia distillation

E) carbonization of ammoniated brine

175. Waste products of soda ash manufacture:

A) limy fines, distiller liquid, lime furnace gases

B) limy fines, pyrite cinder, acid waste water

C) phosphogypsum, acid waste water

D) sulphuric acid fog, fluorine-containing gases

E) distiller liquid, ferrophosphorus

176. The Solve method is used for manufacture of …

A) soda ash

B) caustic soda

C) potassium fertilizers

D) wet-process phosphoric acid

E) sodium tripolyphosphate

177. A main stage of ammoniac saltpeter production is …

A) neutralization of nitric acid with gaseous ammonia

B) evaporation of ammoniac saltpeter solutions

C) crystallization of ammoniac saltpeter melt

D) cooling a salt

E) packing a ready product

178. Caustic soda is used for manufacture of …

A) paper

B) mineral fertilizers

C) soda ash

D) sulphuric acid

E) yellow phosphorus

179. One of the caustic soda consumers is …

A) soap production

B) sodium tripolyphosphate manufacture

C) sulphuric acid production

D) mineral fertilizer production

E) processing of phosphorite

180. A basic way of sodium hydroxide manufacture:

A) electrolysis of sodium chloride solution

B) caustification of soda solution

C) calcination of an iron oxide and soda ash mixture

D) decomposition of sodium ferrite by water

E) neutralization of limy milk with table salt

181. Products formed at the electrolysis of sodium chloride

A) caustic soda, hydrogen, chlorine

B) sodium metal, hydrogen, chlorine

C) soda ash, sodium hydroxide

D) sodium hydroxide, oxygen, hydrogen

E) sodium metal, oxygen, hydrochloric acid

182. What is a basic advantage of the sodium hydroxide production by a mercury-cathode method?

A) obtaining a concentrated, high-purity sodium hydroxide solution

B) absence of harmful waste products

C) low energy consumption

D) cheapness

E) production of coarse-crystalline sodium hydroxide

183. At the electrochemical way of caustic soda production a …. cathode is applied.

A) mercury

B) coal

C) copper

D) silver

E) soluble

184. What is a basic disadvantage of the sodium hydroxide production by a mercury-cathode method?

A) formation of high toxic wastes

B) insufficient purity of a product

C) formation of harmful by-products

D) expensive initial raw material

E) low productive efficiency

185. A main stage of the electrochemical caustic soda way:

A) formation of sodium amalgam in an electrolyzer

B) chemical interaction between sodium oxide and water

C) interaction between an alkali and an acid

D) dissolution of sodium chloride in water

E) mercury distillation

186. The most simple way of cleaning waste gases of caustic soda manufacture from mercury:

A) multistage cooling the gases

B) sublimation of mercury

C) absorption method

D) adsorption method

E) ion exchange

187. What is slime?

A) suspension

B) cinder

C) concentrated salt solution

D) residue after calcination

E) acid waste water

188. What is slime?

A) amorphous mass

B) cinder

C) fog-containing gas

D) soot

E) acid waste water

189. A by-product produced at melting ferrous and non-ferrous metals is …

A) slag

B) cinder

C) ash

D) dust

E) soot

190. Pyrite cinder composition includes:

A) metal oxides and sulphides, quartz

B) iron metal, aluminosilicates

C) quartz, ferrophosphorus

D) ferrosilicon, aluminosilicates

E) elemental non-ferrous metals

191. Pyrite cinder is used …

A) in cement and glass industries

B) in pulp-and-paper industry

C) in mining industry

D) in food industry

E) at artificial fibers production

192. The most perspective way of pyrite cinder processing:

A) chloridizing roasting

B) acid decomposition

C) alkaline leaching

D) water washing

E) calcination

193. A chemical composition of halite waste:

A) sodium chloride with potassium chloride impurity

B) potassium chloride with sodium chloride impurity

C) iron oxides and sulphides, quartz

D) aluminosilicates, quartz

E) potassium hydroxide, alumina

194. The most widespread chloridizing agent:

A) sodium chloride

B) gaseous chlorine

C) organic chlorine-containing compounds

D) hydrochloric acid

E) copper chloride

195. Pyrite cinder is applied …

A) for iron production

B) for fertilizer production

C) for sulphuric acid production

D) for pyrite production

E) for phosphorus production

196. Halite waste is formed …

A) at potash fertilizer manufacture

B) at nitric fertilizer production

C) at burning iron pyrite

D) at burning phosphorite

E) at acid leaching phosphorite

197.Potash fertilizers are generally produced from …

A) sylvinite

B) dolomite

C) phosphorite

D) apatite

E) mirabilite

198. Halite waste can be used for production …

A) table salt

B) gypsum

C) cement

D) non-ferrous metals

E) iron

199. Temperature of chloridizing roasting of pyrite cinder:

A) 1500^oC

B) 2000^oC

C) 500 K

D) 273 K

E) 1200 ^oC

200.Chloridizing roasting of pyrite cinder is a process of …

A) sublimation of non-ferrous metal chlorides

B) electrosmelting of non-ferrous metals

C) alloyed steel manufacture

D) oxidation of elemental metals to oxides

E) treatment of metals with hydrochloric acid

201. A basic way of phosphorites concentration:

A) foam flotation

B) magnetic separation

C) gravitational concentration

D) water washing

E) decrepitation

202. Flotation concentration is based …

A) on selective wettability of minerals

B) on different electro conductivity of minerals

C) on different magnetic properties of minerals

D) on different solubility in water

E) on different chemical properties of substances

203. Phosphogypsum is formed at the manufacture of …

A) phosphoric acid

B) yellow phosphorus

C) potash fertilizers

D) soda ash

E) alloyed steel

204. The most widespread method of solid waste utilization to date is

A) ground storage

B) pyrolysis

C) catalytic oxidation

D) burning

E) use as secondary raw material

205. A basic component of phosphate concentration tails is …

A) fine silica sand

B) fluoroapatite

C) iron oxides

D) non-ferrous metal sulphides

E) alumina

206. Basic components of phosphoric slag are …

A) CaO, SiO₂

B) FeO, CaO

C) non-ferrous metal oxides

D) elemental phosphorus

E) phosphogypsum

207. Metallurgical slags consists of …

A) metal oxides

B) metal sulphides

C) elemental metals

D) metal chlorides

E) metal sulphates

208. Ferrophosphorus – is …

A) a by-product of phosphorus manufacture

B) waste of phosphoric fertilizers production

C) a by-product of acid processing of phosphates

D) a component of metallurgical slag

E) alloyed steel

209. Ferrophosphorus is used for production of …

A) steel

B) yellow phosphorus

C) phosphoric acid

D) sodium tripolyphosphate

E) phosphine

210. Phosphorus slag – is …

A) a by-product of yellow phosphorus condensation

B) an end product of thermal processing of phosphorites

C) solid waste of acid processing of phosphates

D) slag formed at electro smelting of different metals

E) waste product of phosphorus fertilizers production

211. Waste water of phosphoric fertilizer manufacture contains …

A) fluorine compounds

B) chlorine compounds

C) heave metals

D) sulphur oxides

E) nitrogen oxides

212. An effective adsorbent of mercury compounds:

A) zeolite

B) sulphuric acid solution

C) water

D) platinum

E) vanadium oxide

213. Extraction method of phosphoric acid manufacture:

A) decomposition of natural phosphate with sulphuric acid

B) thermal oxidation of phosphorite

C) treatment of phosphorite with alkaline solutions

D) extraction of P₂O₅ with organic solvents

E) burning of yellow phosphorus

214. A solid phase formed at sulphuric acid processing of phosphorite:

A) calcium sulphate

B) sodium chloride

C) iron oxide

D) sodium hydrocarbonate

E) hydrogen fluoride

215. Phosphoric acid produced at acid decomposition of phosphates has concentration of …

A) 25-32 %

B) about 50 %

C) 18 %

D) 63 %

E) 35-45 %

216. What solution is used for irrigation of washing towers for absorption of fluorine compounds at manufacture of wet-process phosphoric acid?

A)H₂SiF₆ solution

B) hot water

C) diluted sulphuric acid

D) soda ash solution

E) SiF₄ solution

217. Waste water of wet-process phosphoric acid manufacture contains …

A) P₂O₅, fluorine compounds

B) elemental P, P₂O₅

C) heavy metals

D) cyanides

E) dissolved F₂

218. One of the possible application of phosphogypsum is …

A) manufacture of sulphuric acid

B) production of elemental phosphorus

C) production of mineral fertilizers

D) manufacture of phosphoric salts

E) production of metal sulphides

219. Waste product – selenium slime – is formed at manufacture of …

A) sulphuric acid

B) soda ash

C) yellow phosphorus

D) steel

E) building materials

220. Gaseous waste of sulphuric acid production:

A) SO₂-containing gases

B) CO₂-containing gases

C) fluoric compounds

D) H₂S-containing gases

E) phosphorus compounds

221. The most rational way of pyrite cinder processing:

A) low-temperature chloridizing roasting

B) high-temperature chloridizing roasting

C) chloridosublimation

D) oxidizing roasting

E) electro smelting

222. Temperature of low-temperature chloridizing roasting of pyrite cinder:

A) 550-600^oC

B) 1000^oC

C) 1500-1550^oC

D) to 450^oC

E) 1200-1300^oC

223. At processing of pyrite cinder we can obtain …

A) non-ferrous metals

B) iron pyrite

C) elemental sulphur

D) sulphuric acid

E) mineral fertilizers

224. Content of selenium compounds in iron pyrite:

A) 0,002-0,02 %

B) 0,02-0,2 %

C) about 2 %

D) 2-5 %

E) above 5 %

225. Selenium content in the weak selenium slime:

A) about 5 %

B) up to 50 %

C) 0,002-0,02 %

D) 10-12 %

E) 18-20 %

226. Selenium content in the rich selenium slime:

A) up to 50 %

B) about 5 %

C) 0,02-0,2 %

D) 12-15 %

E) 20-24 %

227. The most rational method of acid waste water treatment:

A) neutralization with lime or soda

B) double contact method

C) ammonia way

D) ion exchange method

E) rectification

228. Waste water of yellow phosphorus manufacture is called …

A) cottrel milk

B) phosphoric slime

C) “white seas”

D) acid waste water

E) selenium slime

229. Phosphorus contains in waste water of dry-process phosphoric acid production as suspended particles therefore for decrease of industrial phosphorus loss it is caught by …

A) mechanical methods

B) absorption methods

C) ion exchange methods

D) chemical methods

E) distillation methods

230. To increase the efficiency of fine-dispersed particles sedimentation it is necessary to add …

A) coagulant

B) catalyst

C) inhibitor

D) flux material

E) surface active substance

231.An oxidation process

A) burning

B) settling

C) sublimation

D) reduction

E) ion exchange

232. A main Kazakhstan producer of phosphorus-containing fertilizers

A) LP “Kazphosphate”

B) LP “Kazazot”

C) “Kazatomprom”

D) LP “Sary-Tas”

E) “Kazzinc”

233. The first stage of diluted nitric acid production:

A) catalyst oxidation of ammonia

B) oxidation of NO to NO₂

C) absorption of nitrogen oxides with water

D) interaction of liquid nitrogen oxides with water and oxygen

E) oxidation of nitrogen oxides with hydrogen peroxide

234. The second stage of diluted nitric acid production:

A) oxidation of NO to NO₂

B) catalyst oxidation of ammonia

C) oxidation of nitrogen oxides with hydrogen peroxide

D) absorption of nitrogen oxides with water

E) interaction of liquid nitrogen oxides with water and oxygen

235. The third stage of diluted nitric acid production:

A) absorption of nitrogen oxides with water

B) burning of ammonia

C) chemisorptions of N₂O₃ with alkaline solutions

D) catalytic reduction of nitrogen oxides

E) high-temperature reduction of nitrogen oxides

236. For manufacture of diluted nitric acid it is used …

A) platinum catalyst

B) vanadium catalyst

C) copper catalyst

D) activated coal

E) zeolites

237.A chemical reagent used for sulphidic method of mercury-containing waste water purification:

A) sodium sulphide

B) water

C) hydrogen sulphide

D) elemental sulphur

E) nitric acid

238. What substances are used for high-temperature reduction of nitrogen oxides?

A) CH₄, H₂

B) CO, CO₂

C) CO₂, H₂

D) H₂O₂, KMnO₄

E) C, N₂, Cl₂

239. Diaphragm method of caustic soda production is a …

A) electrochemical method

B) chemical method

C) mechanical method

D) physical method

E) hydraulic method

240. A main component of insoluble residue of phosphate raw material is …

A) silicon-containing minerals

B) fluoroapatite

C) dolomite

D) different carbonates

E) alumina

241. Waste of the mining industry concerns to …

A) solid waste

B) gaseous waste

C) liquid waste

D) nonaqueous waste

E) toxic waste

242. Toxic waste includes

A) arsenic-containing waste

B) organic solvents

C) gaseous heat flows

D) waste of mining industry

E) acidic water solutions

243. Nonaqueous solutions include

A) used oils

B) cinders

C) smokes

D) alkaline waste water

E) mercury-containing waste

244. A characteristic feature of refractory rare metals:

А) high melting point

В) small density

С) don’t form intermetallic compounds

D) don’t cooperate with nonmetals

Е) hardness

245. A characteristic feature of easy rare metals:

А) small density

В) high melting point

С) don’t react with mineral acids

D) hardness

Е) chemical stability

246. A mechanical dressing way of solid materials:

А) grinding

В) chloridosublimation

С) acid leaching

D) agglomeration

Е) magnetic separation

247. Ore mineral raw material:

А) magnetite

В) limestone

С) quartz

D) phosphorite

Е) rock salt

248. A large consumer of pyrite cinder:

A) cement industry

B) paper industry

C) agriculture

D) food industry

E) production of mineral fertilizers

249. A basic way of copper purification:

A) electrolytic refining

B) water washing

C) remelting

D) chloridosublimation

E) acid processing

250. A technology at which all produced wastes are completely used as secondary raw material:

A) non-waste technology

B) improved technology

C) chemical technology

D) industrial technology

E) energy-saving technology

251. Manufacture of inorganic substances includes …

A) manufacture of acids and alkalis

B) manufacture of high-molecular substances

C) manufacture of polymers

D) manufacture of artificial fibres

E) manufacture of pharmaceutical preparations

252. The ores containing ……. concern to iron ores.

A) > 25-30 % of Fe

B) < 25 % of Fe

C) 45-52 % of Fe

D) > 37 % of Fe

E) > 8 % of Fe

253. Basic minerals of iron ores:

A) magnetite, haematite

B) feldspar, limestone

C) monazite, ilmenite

D) apatite, phosphorite

E) chromite, barite

254. Basic minerals of iron ores:

A) siderite, limonite

B) apatite, phosphorite

C) chromite, barite

D) magnetite, quartz

E) horn silver, sylvinite

255. One of the largest Kazakhstan iron deposits is …

A) West Karazhal

B) Kokbulak

C) Irisu

D) Akzhar

E) Kokdzhon

256. The Atasuskiyi iron-manganous field is located in …

A) Karaganda area

B) South Kazakhstan area

C) Almaty area

D) Karatau field

E) Kzyl-Orda area

257. More 90 % of Mn is used for …

A) steel making

B) production of mineral fertilizers

C) manufacture of paints

D) agriculture

E) production of building materials

258. One tonne of manganous steel demands …

A) 7-9 % of Mn

B) 1,5-2,0 % of Mn

C) > 26 % of Mn

D) 18-20 % of Mn

E) over 60 % of Mn

259. A basic part of chromium-containing ores is applied for …

A) production of ferrochromium

B) production of tanning agents

C) in building industry

D) manufacture of inorganic salts

E) manufacture of synthetic fibres

260. Ferrochromium is used …

A) for steel making

B) for production of building materials

C) in agriculture

D) in electrotechnics

E) in chemical industry

261. Which metal is used for plating different goods?

A) chrome

B) iron

C) calcium

D) vanadium

E) germanium

262. Copper ores are processed if they contain …

A) 1-2 % of Cu

B) 10-12 % of Cu

C) 100-120 % Cu

D) > 7 % of Cu

E) 0,1-0,2 % of Cu

263. A total quantity of natural copper-containing minerals:

A) more 150

B) 4

C) 18

D) 65

E) 100

264. On copper stocks Kazakhstan occupies … in the world.

A) 9 place

B) 1 place

C) 5 place

D) 13 place

E) 5 place

265. Kounrad deposit contains …

A) copper ores

B) iron ores

C) titanium ores

D) spodumene ores

E) gold placers

266. On zinc stocks Kazakhstan occupies … in the world.

A) 1 place

B) 4 place

C) 9 place

D) 12 place

E) 2 place

267. Bronze contains …

A) zinc

B) lithium

C) vanadium

D) rhenium

E) lanthanum

268. On lead stocks Kazakhstan occupies … in the world.

A) 4 place

B) 1 place

C) 7 place

D) 11 place

E) 8 place

269. A mineral, which is used for manufacture of potash fertilizers:

A) sylvinite

B) pyrite

C) phosphorite

D) quartzite

E) monasite

270. Sylvinite is a mineral, which represents …

A) a mixture of NaCl and KCl

B) NaCl

C) a mixture of rare-earth oxides

D) crystalline hydrate of sodium sulphate

E) phthorapatite

271.A main component of pyrite cinder:

A) Fe₂O₃

B) Fe₃O₄

C) FeO

D) Fe(OH)₂

E) Fe(OH)₃

272. Halite wastes are formed at manufacture of...

A) potash fertilizers

B) phosphoric fertilezers

C) nitric fertilizers

D) sulphuric acid

E)caustic soda

273. Find the word meaning the chemical process:

A) reduction

B) melting

C) boiling

D) drying

E) evaporation

274. Find the word meaning the chemical process:

A) oxidation

B) crushing

C) washing

D) melting

E) freezing

275. One of the application field of lead:

A) accumulator industry

B) manufacture of white zinc paint

C) jeweller’s art

D) photo industry

E) agriculture

276. These metals concern to the group of light metals:

A) Al and Mg

B) Ca and Fe

C) K and Na

D) Ba and Ni

E) Au and Pb

277. Mineral raw material for manufacture of aluminum:

A) bauxites

B) pyrite

C) fluorite

D) phosphorites

E) chromites

278. At aluminum manufacture bauxite raw material should contain alumina in quantity no less:

A) 45 %

B) 15 %

C) 35 %

D) 13 %

E) 10 %

279. The largest Kazakhstan bauxite deposit is located in …

A) Kustanai area

B) Taraz area

C) Almaty area

D) Kzyl-Orda area

E) Dzhezkazgan area

280. Precious metal ores include:

A) platinoids

B) lanthanides

C) actinides

D) mendelevium

E) californium

281. Ores of rare refractory metals include:

A) tungsten, tantalum, molybdenum, niobium, zirconium, vanadium, titanium

B) copper, lead, zinc, nickel, uranium, gold, silver, osmium, chromium

C) indium, gallium, germanium, thallium, rhenium, potassium, sodium, calcium

D) lithium, beryllium, sodium, potassium, silicon, calcium, barium

E) platinum, chromium, indium, gallium, germanium, thallium, rhenium, calcium

282. Ores of rare trace metals contain:

A) indium, gallium, germanium, thallium, rhenium

B) lanthanum, yttrium, cerium, hafnium, zirconium

C) copper, lead, zinc, nickel, uranium, gold