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`

A black compound of manganese reacts with a halogen acid to give green

1.	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`
Answer» Correct Answer - 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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