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Q.

A is a black compound of manganese. It reacts with a halogen acid B to give a greenish yellow gas C. When excess of C reacts with NH3, an unstable trihalide is formed and B is obtained back. Select the correct statement(s) :

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a

The halogen acid B is HF.

b

Gas C is F2.

c

Hybridization of N remains same in the product as in NH3.

d

When excess of NH3 reacts with C, N2 is formed.

answer is C.

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Detailed Solution

A is a black compound, A is MnO2. B is HCl. C is Cl2. MnO2+4HCl→2H2O+MnCl2 + Cl2 (Greenish yellow gas C) Cl2 (excess) + NH3 → NCl3 (unstable trihalide) + HCl (B)Cl2+NH3 (excess) →N2+NH4Cl
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