QuestionNo:1

The chief ore of aluminium is

[A] Alunite
[B] Bauxite
[C] Cryolite
[D] Felspare



QuestionNo:2

Bauxite is an oxide mineral of

[A] Barium
[B] Boron
[C] Bismuth
[D] Aluminium



QuestionNo:3

Which one of the following is used in the extraction of aluminium by electrolytic process

[A] Al₂O₃
[B] Al(OH)₃
[C] AICl₃
[D] Al₂(SO₄



QuestionNo:4

Which of the following method is not used for the concentration of Bauxite ore

[A] Serpeck’s method
[B] Baeyer’s method
[C] Hoope’s method
[D] Hall’s method



QuestionNo:5

Which one of the following is used in the extraction of aluminium by electrolytic process

[A] Al₂O₃
[B] Al(OH)₃
[C] AICl₃
[D] Al₂(SO₄)₃



QuestionNo:6

Which of the following method is not used for the concentration of bauxite ore

[A] Serpeck’s method
[B] Baeyer’s method
[C] (a) Hoope’s method
[D] Hall’s method



QuestionNo:7

When baxuite is heated with NaOH solution, the water soluble compound formed is

[A] NaAlO₂
[B] Na₃AlO₃
[C] Al(OH)₃
[D] Al₂O₃



QuestionNo:8

100% copper is obtained from crude opper by

[A] Zone refining method
[B] electrorefining
[C] liquation
[D] poling



QuestionNo:9

Commercial zinc is refined by

[A] liquation
[B] poling
[C] electrolysis
[D] amalgamation



QuestionNo:10

Liquation method is used to refine following crude metal

[A] Silver
[B] Lead
[C] Mercury
[D] Copper



QuestionNo:11

Metal refined by cupellation process is

[A] Ag
[B] Fe
[C] Zn
[D] Sn



QuestionNo:12

Ametal contains, metal oxide as impurity. The method used to refine this metal is

[A] Poling
[B] Liquation
[C] Cupellation
[D] Distillation



QuestionNo:13

Which of the following metal is refined by distillation method

[A] Zinc
[B] Iron
[C] Tin
[D] Copper



QuestionNo:14

Which of the following metal is refined by poling process

[A] Na
[B] Cu
[C] Al
[D] Zn



QuestionNo:15

Zone refining method is used for refining

[A] Al
[B] Ge
[C] Cu
[D] Fe