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 :`MnO_(2) + 4HCL to MnCl_(2) + 2H_(2)O + underset("greenish YELLOW")`
`underset(-3)(NH_(3)) + 3Cl_(2) to underset(+3)(NCl_(3)) + 3HCl`


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