Question

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

$\quad$$\quad$$\quad$Column I		$\quad$$\quad$$\quad$Column II
(A)	$V_2O_5$	(i)	Haber s process
(B)	$Ni$	(ii)	Preparation of $O_2$ from $KClO_3$
(C)	$MnO_2$	(iii)	Conversion of $SO_2$ to $SO_3$
(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 $SO _{2}$ to $SO _{3}$ platinised asbestos or $V _{2} O _{5}$ is used as a catalyst.
In the method of preparation of $O _{2}$ from $K _{2} ClO _{3}, MnO _{2}$ is used as a catalyst.
Hydrogenation of vegetable oils in the presence of finely divided nickel (Ni) as a catalyst.