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प्रश्न
A black compound of manganese reacts with a halogen acid to give greenish-yellow gas. When excess of this gas reacts with \[\ce{NH3}\] an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from ______.
पर्याय
– 3 to +3
– 3 to 0
– 3 to +5
0 to – 3
उत्तर
A black compound of manganese reacts with a halogen acid to give greenish-yellow gas. When excess of this gas reacts with \[\ce{NH3}\] an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from – 3 to +3.
Explanation:
\[\ce{\underset{(Black)}{Mno2} + 4HCl -> MnCl2 + \underset{(Greenish yellow gas)}{2H2O} + Cl}\]
When excess of \[\ce{Cl2}\] reacts with \[\ce{NH3}\] the products are \[\ce{NCl3}\] and \[\ce{HCl}\].
\[\ce{NH3 + 3Cl2 -> NCl3 + 3HCl}\]
\[\ce{O.S. (-3) O.S. (+3)}\]
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