Ncert Exercises & Solutions

When a brown compound of manganese (A) is treated with HCL it gives a gas (B). The gas taken in excess, reacts with N $H_{3}$ to give an explosive compound (C). Identify compounds A, B and C.

Thinking Process

This problem is based on the properties of Mn $O_{2}$ , and preparation of NC $L_{3}$

NEETprep Answer: $M n O_{2}$ is the brown compound of Mn which reacts with HCL to give gas.

This gas forms an explosive compound

N C L_{3}

when treated with

N H_{3}

Thus,

A = M n O_{2}; B = C L_{2}; C = N C L_{3}

and reactions are as follows

(i) M n O_{2} + 4 H C L \to M n C L_{2} + \underset{}{C L_{_{2}} + H_{2} O}

[B r]

(i i) N H_{3} + 3 C L_{2} \to N C L_{3} + 3 H C L

(E x c e s s) (C)

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