1.

How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.

Answer» In laboratory, nitrogen is prepared by heating an aqueous solution of `NH_4Cl` and `NaNO_2(1:1)` the `NH_4NO_2` formed as a result of double decomposition reaction, being unstable decomposes to form `N_2` gas.
`NH_4Cl+NaNOtoNH_4NO_2+NaCl`
`NH_4NO_2overset(Delta)N_2+2H_2O`


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