AgNO3 (W) + (X) + O2
(X) + H2O HNO2 + HNO3
(W) + HNO3 Y + NO + H2O
(Y) + Na2S2O3(excess) (Z) + NaNO3
Identify (W) to (Z).

Question

AgNO3 $\xrightarrow{\Delta}$ (W) + (X) + O2
(X) + H2O $\rightarrow$ HNO2 + HNO3
(W) + HNO3 $\rightarrow$ Y + NO + H2O
(Y) + Na2S2O3(excess) $\rightarrow$ (Z) + NaNO3
Identify (W) to (Z).

Prashant Kotian · Accepted Answer

Correct answer: C. Step 1: Mercury is a liquid metal that easily dissolves or reacts with many metals (like silver, lead, and aluminium) to form alloys called amalgams. Step 2: Iron (Fe) is one of the few metals that does not form an amalgam with mercury under normal conditions. Step 3: Because of this chemical inertness toward mercury, steel or iron containers are used to store and transport mercury. This matches option (d).

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