1
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
$$\mathrm{Cu}_2 \mathrm{O}$$
2
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
3
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
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Sulphide ore on roasting gives a gas $$X$$. $$X$$ reacts with $$\mathrm{Cl}_2$$ in the presence of activated charcoal to give $$Y$$. $$Y$$ is

A
$$\mathrm{SO}_2 \mathrm{Cl}_2$$
B
$$\mathrm{S}_2 \mathrm{Cl}_2$$
C
$$\mathrm{SCl}_6$$
D
$$\mathrm{SOCl}_2$$
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