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 _________.

Question

Philoid · Accepted Answer

when a black compound of manganese reacts with a halogen the following reaction takes place:

MnO₂ + 4HCl MnCl₂ + 2H₂O + Cl

A greenish yellow gas is produced, it means that chlorine is liberated during the reaction

When excess of Cl₂ reacts with ammonia:

NH₃ + 2Cl₂NCl₃ + 3HCl

Oxidation state of nitrogen in NH₃ can be calculated by

Let the oxidation state of N is x.

X + 3*(+1) = 0, x = -3

Oxidation state of NCl₃ can be calculated by

X + 3*(-1) = 0, x = +3

Therefore oxidation state of nitrogen varies from -3 to +3.

Hence the correct option is (i).

A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When excess of this gas reacts with NH3 an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from _________.

A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When excess of this gas reacts with NH₃ an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from _________.