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Q.

Bronze when treated with hot concentrated HNO3 :-

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a

Sn is dissolved to give colorless solution Sn(NO2)2

b

Tin is Oxidised to metastannic acid in the form of white precipitate.

c

Cu and Zn both readily dissolves

d

Copper is dissolved in to give blue solution

answer is B, D.

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Detailed Solution

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Bronze is 78% copper and 12% tin. Nitric acid will dissolve the copper but but this reaction is exothermic which means it will heat up. At boiling temperature , nitric acid will also react with Sn to form meta stannic acid in the form of white precipitate.

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Bronze when treated with hot concentrated HNO3 :-