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# Question and Answer

The following reactions are carried out:

$$A:$$ Nitrogen + metal $$\rightarrow$$ compound $$X$$
$$B:$$ $$X$$ + water $$\rightarrow$$ ammonia + another compound
$$C:$$ Ammonia + metal oxide $$\rightarrow$$ metal + water + $$N_2$$

One metal that can be used for reaction $$A$$ is magnesium. Write the correctly balanced equation for reaction $$B$$, where $$X$$ is the compound formed.
(A) $${Na }{ N }_{ 2 }+{ H }_{ 2 }O\rightarrow { NH }_{ 3 }+Na_2O$$
(B) $${Mg }_{ 3 }{ N }_{ 2 }+{ 3H }_{ 2 }O\rightarrow { 2NH }_{ 3 }+ 3MgO$$
(C) $${Ca }_{ 3 }{ N }_{ 2 }+{ H }_{ 2 }O\rightarrow { NH }_{ 3 }+CaO$$
(D) None of these
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## QuestionChemistryClass 12

The following reactions are carried out:

$$A:$$ Nitrogen + metal $$\rightarrow$$ compound $$X$$
$$B:$$ $$X$$ + water $$\rightarrow$$ ammonia + another compound
$$C:$$ Ammonia + metal oxide $$\rightarrow$$ metal + water + $$N_2$$

One metal that can be used for reaction $$A$$ is magnesium. Write the correctly balanced equation for reaction $$B$$, where $$X$$ is the compound formed.
(A) $${Na }{ N }_{ 2 }+{ H }_{ 2 }O\rightarrow { NH }_{ 3 }+Na_2O$$
(B) $${Mg }_{ 3 }{ N }_{ 2 }+{ 3H }_{ 2 }O\rightarrow { 2NH }_{ 3 }+ 3MgO$$
(C) $${Ca }_{ 3 }{ N }_{ 2 }+{ H }_{ 2 }O\rightarrow { NH }_{ 3 }+CaO$$
(D) None of these

One metal that can be used for reaction A is magnesium. So the corresponding reaction A is$$N_2 + 3Mg\rightarrow Mg_3N_2$$
Hence the compound X is $$-\ Mg_3N_2$$.
The complete reactions involving $$Mg$$ are as follows:

A:$$N_2 + 3Mg\rightarrow Mg_3N_2$$

B:$$Mg_3N_2+6H_2O\rightarrow 3Mg(OH)_2+2NH_3$$

C: $$2NH_3+ 3MgO\rightarrow 3Mg+3H_2O+N_2$$

The correct balanced equation for reaction B is$$Mg_3N_2+6H_2O\rightarrow 3Mg(OH)_2+2NH_3$$