Q.

When Sn is treated with conc. HNO3

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a

it is converted into stannic nitrate.

b

it becomes passive.

c

it is converted into metastannic acid.

d

it is converted into stannous nitrate.

answer is C.

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Detailed Solution

Tin (Sn) forms metastannic acid, nitric oxide, and water when Sn reacts with concentrated nitric acid.

Sn+4 conc. HNO3H2SnO3metastannic acid+4NO2+H2O

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When Sn is treated with conc. HNO3