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

Answer»

`-3 " to " + 3`
`-3 " to " 0`
`-3 " to " + 5`
`0 " to " -3`

Solution :`UNDERSET("(Black)") + 4HCL RARR MnCl_2 + 2H_2O + underset("(Greenish YELLOW gas)")(Cl_2) : overset(-3)(NH_3) + 3Cl_2 rarr overset(+ 3 -1)(NCl_3) +3HCl`


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