From the following which compound have -1 oxidation number of nitrogen

1.	From the following which compound have -1 oxidation number of nitrogen ?
Answer» `NH_(2)-NH_(2)` `NH_(3)` `NH_(2)OH` `NH_(4)OH` SOLUTION :`NH_(2)OHrArrN+3(H)+O=0` `rArrN+3-2=0` `rArrN=-1`

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