Q. 38

When a brown compound of manganese (A) is treated with HCl it gives a gas (B). The gas taken in excess, reacts with NH₃ to give an explosive compound (C). Identify compounds A, B and C.

Class 12th Chemistry - Exemplar 8. The d-and f-Block Elements

Answer :

When brown co pound of manganese (A) is treated with HCl it gives chlorine gas.

MnO₂ + 4HCl → MnCl₂ + Cl₂ +2H₂O

^{(A) (B)}

The chlorine gas reacts with NH₃ to given NCl₃

3Cl₂ + NH₃ →NCl₃ + 3HCl

^{(B) (C)}

The brown compound A = MnO₂

Gas B = Cl₂

Explosive compound C= NCl₃

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