p-Block elementsHard

Question

Which of the following statements is (are) correct ?

Options

A.Antimony on reaction with conc. HNO3 gives antimonic acid.
B.Manganese on reaction with cold and dilute HNO3 gives NO2 gas.
C.HNO2 disproportionate to give HNO3 and NO
D.HNO3 on reaction with P4O10 gives N2O5

Solution

(A) Sb + 5HNO3 → H3SbO4 + 5NO2 + H2O
(B) Mn + 2HNO3 → Mn(NO3)2 + H2
(C) 3HNO2 → HNO3 + 2NO + H2O
(D) 4HNO3 + P4O10 2N2O5 + 4HPO3

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