Question

Match the column I with column II and mark the appropriate choice.

Column I		Column II
(A)	$V_2{O}_5$	(i)	Haber s process
(B)	$Ni$	(ii)	Preparation of $O_2$ from $KCl{O}_3$
(C)	$Mn{O}_2$	(iii)	Conversion of $S{O}_2$ to $S{O}_3$
(D)	$Fe$	(iv)	Hydrogenation of oils

• A. (A) $\to$ (i), (B) $\to$ (iii), (C) $\to$ (ii), (D) $\to$ (iv)
• B. (A) $\to$ (ii), (B) $\to$ (i), (C) $\to$ (iii), (D) $\to$ (iv)
• C. (A) $\to$ (iii), (B) $\to$ (iv), (C) $\to$ (ii), (D) $\to$ (i)
• D. (A) $\to$ (iv), (B) $\to$ (ii), (C) $\to$ (i), (D) $\to$ (iii)

Answer 1

Answer: (C)

Substances, which accelerate the rate of a chemical reaction and themselves remain chemically and quantitatively unchanged after the reaction, are known as catalysts.
Various catalysts used to manufacture different compounds are-
The combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron is Haber's process.
$Fe$ is used as a catalyst.
To convert $S{O}_2$ to $S{O}_3$ platinised asbestos or $V_2{O}_5$ is used as a catalyst.
In the method of preparation of $O_2$ from $K_{2}Cl{O}_3,Mn{O}_2$ is used as a catalyst.
Hydrogenation of vegetable oils in the presence of finely divided nickel (Ni) as a catalyst.