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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))+4HClrarrMnCl_(2)+underset("(greenish yellow gas)")(Cl_(2)uarr)+2H_(2)O`
`overset("(-3)")(NH_(3))+underset("(excess)")(3Cl_(2))rarroverset(+3)(NCl_(3))+3HCl`
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