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A black compound of manganese reacts wit...

A black compound of manganese reacts with a halogen acid to give greenish yellow gas . When excess of this gas reacts with `NH_(3)` an unstable trihalide is formed. In this process, the oxidation state of nitrogen changes from

A

`-3` to + 3

B

`-3` to 0

C

`-3` to + 5

D

0 to -3

Text Solution

Verified by Experts

The correct Answer is:
A
`underset(("Black"))(MnO_(2))+4HCl rarr MnCl_(2) + 2H_(2)O + underset(("greenish yellow gas"))(Cl_(2))`
`overset(-3)(NH)_(3)+ 3Cl_(2) rarr overset(+3)(NCl)_(3)+3HCl`
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