Consider three P, Q, R salts among them P and Q salts have different cations and also have different coloured polyatomic anion due to charge transfer phenomenon while P and R salts have same cation bu

Question

Consider three P, Q, R salts among them P and Q salts have different cations and
also have different coloured polyatomic anion due to charge transfer phenomenon 
while P and R salts have same cation but have different anions. Salt R 
decomposes into an acidic gas and a basic gas.

Prashant Kotian · Accepted Answer

Correct answer: C. Step 1: Identify the initial state of the reactants. Zinc hydroxide, Zn(OH)2↓, is an insoluble amphoteric white precipitate. Step 2: Observe the reaction with strong base. When excess sodium hydroxide (NaOH) is added, the precipitate reacts to form soluble sodium zincate (Na2ZnO2). Step 3: Because the insoluble precipitate dissolves to form a clear solution of a soluble complex salt, this is a precipitate dissolution reaction (type B). Thus, the correct option is (b).

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