1
Titanium is produced by
A)
electrolytic reduction of TiCl4
B)
calcium reduction of TiCl4
C)
magnesium reduction of TiCl4
D)
thermal dissociation of TiCl4
Answer & Solution
Answer: Option
C
2
Given the following assertion 'A' . and the reason 'R' the correct option isAssertion A: In Bayer's process, high pressure is used to dissolve alumina from bauxite.Reason R: Pressure increases the boiling point of water.
A)
Both A and R are correct, but R is not the correct reason for A
B)
Both A and R are false
C)
Both A and R are correct and R is the correct reason for A
D)
A is true but R is false
Answer & Solution
Answer: Option
C
3
Characteristics of Zinc meta
A)
Atomic number: 30, Atomic weight: 65.38
B)
Density: 7.13 gm/cm3
C)
Melting point: 419.5°C, Boiling point: 910°C
D)
All are correct
Answer & Solution
Answer: Option
D
4
Match the type of reagent used in floatation in
Group 1 with reagent in
Group 2 .
Group 1 Group 2
P. Collector
1. Pine oil
Q. Regulator
2. Copper sulphate
R. Activator
3. Sodium ethyl xanthate
S. Frother
4. Lime
A)
P-2, Q-3, R-4, S-1
B)
P-4, Q-2, R-3, S-1
C)
P-3, Q-4, R-2, S-1
D)
P-1, Q-3, R-2, S-4
Answer & Solution
Answer: Option
C
5
The process of cementation involves
A)
separation of the desired metal by adding a more reactive metal
B)
elimination of a more reactive metal from molten metal by preferential oxidation
C)
refinning by preferential dissolution of the desired metal in a organic solvent
D)
extraction by selective dissolution of the desired metal in an inorganic solvent
Answer & Solution
Answer: Option
B
6
The following metals such as Mg, Al and Na is used to extract from
A)
Aqueous electrolytes
B)
Fused Salt
C)
Both A and B
D)
None of the these
Answer & Solution
Answer: Option
B
7
A conventional (Pierce-Smith) copoer converter is
A)
blown from both top and bottom
B)
bottom blown
C)
side blown with single tuyer
D)
Side blown with multiple tuyer
Answer & Solution
Answer: Option
D
8
Who has practically demonstrated the electrolysis of sodium hydroxide
A)
Hall-Heroult
B)
Castner
C)
Bayer
D)
None of these
Answer & Solution
Answer: Option
B
9
Match the processes given in
Group I with the corresponding metals in
Group 2 .
Group 1 Group 2
P. Matte smelting
1. Lead
Q. Cyanide leaching
2. Copper
R. Carbothermic reduction
3. Gold
S. Fused salt electrolysis
4. Aluminium
A)
P-1, Q-2, R-1, S-4
B)
P-2, Q-3, R-1, S-4
C)
P-2, Q-1, R-3, S-4
D)
P-2, Q-3, R-4, S-1
Answer & Solution
Answer: Option
B
10
Match the unit processes in
Group 1 with the objectives in
Group 2 .
Group 1 Group 2
P. Leaching
1. Precipitation of metal in aqueous solution
Q. Cementation
2. Selective dissolution of metal
R. Roasting
3. Conversion of mattee to metal
S. Converting
4. Conversion of sulfide to oxide
5. Separation of metal from slag
A)
P-2, Q-1, R-3, S-5
B)
P-2, Q-1, R-4, S-3
C)
P-3, Q-4, R-5, S-2
D)
P-4, Q-3, R-2, S-1
Answer & Solution
Answer: Option
B
