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Addition Reactions

when a brown ...

Question

when a brown compouund of manganese (A) treated with hcl, a gas (B) is evolved. this taken on excess with nh3 gives an explosive compund (C).identify A, B, C.

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Solution

Dear Student,

Compound A is MnO₂. The reaction of MnO₂ with HCl is:
MnO₂ + HCl ----> MnCl₂ + H₂O + Cl₂
Cl₂is gas B. When Cl₂ is reacted with NH₃:
Cl₂ + NH₃ ---> NCl₃ + H₂
NCl₃ is compound C, which is an explosive.

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