Column (I)
(Main gaseous product)
Column (II)
(Reactant/Process)
(A) $SO_{2}$
(P) Electrolysis of NaCl (Aq.)
(B) $NH_{3}$
(Q) $Zn + NaOH$ solution
(C) $H_{2}$
(R) $NaNO_{3} + Al + KOH$ solution
(D) $Cl_{2}$
(S) $S_{2} O_{3}^{2 -} +$ dil $H_{2} SO_{4}$

(T) $C u +$ con. $H_{2} SO_{4}$

Question

Column (I) (Main gaseous product)	Column (II) (Reactant/Process)
(A) $SO_{2}$	(P) Electrolysis of NaCl (Aq.)
(B) $NH_{3}$	(Q) $Zn + NaOH$ solution
(C) $H_{2}$	(R) $NaNO_{3} + Al + KOH$ solution
(D) $Cl_{2}$	(S) $S_{2} O_{3}^{2 -} +$ dil $H_{2} SO_{4}$
	(T) $C u +$ con. $H_{2} SO_{4}$

TestHub · Accepted Answer

SO₂ (A): Produced by the reaction of thiosulfate with acid (S) and the reduction of concentrated sulfuric acid by copper (T).

NH₃ (B): Generated through the reduction of nitrate ions by aluminum in a basic medium (R).

H₂ (C): Formed by the reaction of zinc with sodium hydroxide (Q) and at the cathode during the electrolysis of aqueous NaCl (P).

Cl₂ (D): Produced at the anode during the electrolysis of aqueous NaCl (P).

Matching these results leads to Option C: $A \to ST, B \to R, C \to PQ, D \to P$

Chemistry - Salt Analysis Question with Solution | TestHub