Match List I with List II. List-I (Anion) List-II (gas evolved on reaction with dil. H 2 SO 4 ) (A) CO 3 2 - (I) Colourless gas which turns lead acetate paper black. (B) S 2 - (II) Colourless gas whic

Question

Match List I with List II. List-I (Anion) List-II (gas evolved on reaction with dil. H 2 SO 4 ) (A) CO 3 2 - (I) Colourless gas which turns lead acetate paper black. (B) S 2 - (II) Colourless gas which turns acidified potassium dichromate solution green. (C) SO 3 2 - (III) Brown fumes which turns acidified KI solution containing starch blue. (D) NO 2 - (IV) Colourless gas evolved with brisk effervescence, which turns lime water milky. Choose the correct answer from the options given below

TestHub · Accepted Answer

When small amount of carbonate salt is treated with dilute $H_{2} {SO}_{4}$ or dilute $HCl$ , A colourless, odourless gas $({CO}_{2})$ is evolved with brisk effervescence

When small amount of the following salts are treated with dilute $H_{2} {SO}_{4}$ the following observations are seen.

Carbonate salt $({CO}_{3}^{2 -})$	Brisk effervescence of ${CO}_{2}$ gas, ${CO}_{3}^{2 -} + H_{2} {SO}_{4} \to {SO}_{4}^{2 -} + H_{2} O + {CO}_{2} ↑$
Sulphide salt $(S^{- 2})$	A colourless gas $(H_{2} S)$ with rotten egg smell

${Na}_{2} S + H_{2} {SO}_{4} \to {Na}_{2} {SO}_{4} + H_{2} S ↑$

NO^{2 –} on reaction with dilute H₂SO₄will give brown NO₂(g) will turn KI solution blue.

${SO}_{3}^{2 -}$ on reaction with dilute $H_{2} {SO}_{4}$ will give ${SO}_{2} (g)$ , which will turn acidified potassium dichromate solution green.

List-I (Anion)	List-II (gas evolved on reaction with dil. $H_{2} {SO}_{4}$ )
(A) ${CO}_{3}^{2 -}$	(I) Colourless gas which turns lead acetate paper black.
(B) $S^{2 -}$	(II) Colourless gas which turns acidified potassium dichromate solution green.
(C) ${SO}_{3}^{2 -}$	(III) Brown fumes which turns acidified KI solution containing starch blue.
(D) ${NO}_{2}^{-}$	(IV) Colourless gas evolved with brisk effervescence, which turns lime water milky.

Chemistry - Salt Analysis Question with Solution | TestHub

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