1.

How is ammonia prepared?

Answer»

Solution :(i) Ammonia is formed by the hydrolysis of UREA.
`NH_(4)CONH_(2)+H_(2)Orarr 2NH_(3)+CO_(2)`
(II) Amoonia is prepared in the laboratory by heating an ammonium salt with a base.
`2NH_(4)^(+)+OH^(-)rarr 2NH_(3)+H_(2)O`
`2NH_(4)Cl+CaOrarr CaCl_(2)+2NH_(3)+H_(2)O`
(III) It can also be prepared by heating a metal nitrides such as magnesium nitride with water.
`Mg_(3)N_(2)+6H_(2)rarr 3MG(OH)_(2)+2NH_(3)`


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