1
KCET 2020
MCQ (Single Correct Answer)
+1
-0
Copper is extracted from copper pyrites by
2
KCET 2020
MCQ (Single Correct Answer)
+1
-0
Function of potassium ethyl xanthate in froth floatation process is to make the ore
3
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
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0
Among the following, the main reactions occurring in blast furnace during extraction of iron from haematite are
(i) $$\mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{CO} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_2$$
(ii) $$\mathrm{FeO}+\mathrm{SiO}_2 \rightarrow \mathrm{FeSiO}_3$$
(iii) $$\mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{C} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}$$
(iv) $$\mathrm{CaO}+\mathrm{SiO}_2 \rightarrow \mathrm{CaSiO}_3$$
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