One mole of magnesium nitride on the reaction with an excess of water gives

  • Option 1)

    one mole of ammonia

  • Option 2)

    one mole of nitric acid

  • Option 3)

    two moles of ammonia

  • Option 4)

    two moles of nitric acid.

 

Answers (1)

As we learnt in

Action of alkaline earth metals with nitrogen -

form nitrides when of the type M_{3}N_{2}, these hydrolysed with water evolving NH3

- wherein

3M+N{_2}\rightarrow M{_3}N{_2}\\ M{_3N{_2}}+6H{_2}O\rightarrow 3M(OH){_2}+2NH{_3}

 

Mg_{3}N_{2}+6H_{2}O\rightarrow 3Mg\left ( OH \right )_{2}+2NH_{3}
                                               3 Moles              2 Moles


                                           


Option 1)

one mole of ammonia

This option is incorrect.

Option 2)

one mole of nitric acid

This option is incorrect.

Option 3)

two moles of ammonia

This option is correct.

Option 4)

two moles of nitric acid.

This option is incorrect.

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