71
In the Gadeu Process, the purity in % and density of Aluminium
A)
2.29 & 99.99
B)
3.29 & 99.99
C)
4.29 & 99.99
D)
None of these
Answer & Solution
Answer: Option
A
72
Identify the correct statement.
A)
Sphalerite is zinc oxide
B)
The first law of thermodynamics is stated as δE = δQ - δW
C)
Lead can be produced in a blast furnace
D)
T. Ferroxidans is a fungus that can be used for leaching chalcopyrite
Answer & Solution
Answer: Option
C
73
What are the disadvantages of Newer Process
A)
A thick mushy layer form in between matte and slag which interfering into the separation
B)
A wide variation in temperature as 200°C at top to 1200°C
C)
Both A and B
D)
None of these
Answer & Solution
Answer: Option
C
74
In the commercial production of which of the following metals, metallothermic reduction is used?
A)
Copper
B)
Zinc
C)
Zirconium
D)
Nickel
Answer & Solution
Answer: Option
B
75
Which one of the following minerals is a source of titanium?
A)
Haematite
B)
Magnetite
C)
Ilmenite
D)
Pyrolusite
Answer & Solution
Answer: Option
C
76
Match the metal in
Group 1 with its corresponding ore in
Group 2 .
Group 1 Group 2
P. Ni
1. Monazite
Q. Th
2. Cassiterite
R. Pb
3. Penlandite
S. Sn
4. Galena
A)
P-1, Q-3, R-4, S-2
B)
P-4, Q-3, R-3, S-1
C)
P-3, Q-1, R-4, S-2
D)
P-2, Q-3, R-1, S-4
Answer & Solution
Answer: Option
C
77
Zone refinning is a process in which
A)
a metalrod is dipped in a molten pool of liquid to dissolve slowly and the liquid is refined continuously
B)
liquid metal is refined in the zone of electric arc in the DC arc furnace
C)
a metal in the form of long rod is melted over a short length and molten region is made to traverse along the length of the rod
D)
a long metal rod is cut into small parts and each part is melted and refined separately
Answer & Solution
Answer: Option
C
78
Match the following metals with their extraction processes.
Group 1 Group 2
P. Gold
1. Pidgeon process
Q. Titanium
2. Cyanidation
R. Magnesium
3. Mond process
S. Nickel
4. Kroll's process
A)
P-2, Q-3, R-1, S-4
B)
P-2, Q-3, R-4, S-1
C)
P-4, Q-3, R- 2, S-1
D)
P-1, Q-2, R-3, S-4
Answer & Solution
Answer: Option
A
79
Characteristics of Aluminium metal
A)
Atomic number: 13, Atomic weight: 27
B)
Density: 2.702 gm/cm3
C)
Melting point: 660°C, Boiling point: 24677°C
D)
All are correct
Answer & Solution
Answer: Option
D
80
Match the following ores with their chemical formula.
Group 1 Group 2
P. Sphalerite
1. Cu2 S
Q. Covellite
2. CuS
R. Anglesite
3. PbSO4
S. Chalcocite
4. ZnS
A)
P-4, Q-2, R-3, S-1
B)
P-4, Q-3, R-2, S-1
C)
P-4, Q-2, R-1, S-3
D)
P-3, Q-2, R-1, S-4
Answer & Solution
Answer: Option
A
