1
KCET 2024
MCQ (Single Correct Answer)
+1
-0

Select the correct statement :

A
Roasting involves heating the ore in the absence of air.
B
Calcination involves heating the ore above its melting point.
C
Smelting involves heating the ore with suitable reducing agent and flux below its melting point.
D
Calcination of calcium carbonate is endothermic.
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

For the formation of which compound in Ellingham diagram $$\Delta G^{\circ}$$ becomes more and more negative with increase in temperature?

A
$$\mathrm{CO}$$
B
$$\mathrm{FeO}$$
C
$$\mathrm{ZnO}$$
D
$$\mathrm{Cu}_2 \mathrm{O}$$
3
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Copper is extracted from copper pyrites by

A
thermal decomposition
B
reduction by coke
C
electrometallurgy
D
auto reduction
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Function of potassium ethyl xanthate in froth floatation process is to make the ore

A
lighter
B
hydrophobic
C
hydrophilic
D
heavier
KCET Subjects
EXAM MAP