Question

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

Column I	Column II
(A) Thiosulphuric acid	$\left(i\right)H_{2}S{O}_5$
(B) Caro's acid	$\left(ii\right)H_2{S}_2{O}_6$
(C) Marshall's acid	$\left(iii\right)H_2{S}_2{O}_3$
(D) Dithionic acid	$\left(iv\right)H_2{S}_2{O}_8$

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

Answer 1

Answer: (C)

(A) $\to$ (iii); (B) $\to$ (i); (C) $\to$ (iv); (D) $\to$ (ii)

(A) Thiosulphuric acid - $H_2{S}_2{O}_3$

(B) Caro's acid - $H_{2}S{O}_5$

(C) Marshall's acid - $H_2{S}_2{O}_8$

(D) Dithionic acid - $H_2{S}_2{O}_6$

So from the above formulae of the compounds the correct match is

$\left(A\right)\to \left(iii\right);\left(B\right)\to \left(i\right);\left(C\right)\to \left(iv\right);\left(D\right)\to \left(ii\right).$

Hence option C is correct.