Very pure N_(2) can be obtained by

1.	Very pure N_(2) can be obtained by
Answer» thermal DECOMPOSITION of ammonium dichromate treating aqueous solution of `NH_(4)ClandNaNO_(2)` liquefaction and fractional DISTILLATION of LIQUID air thermal decomposition of SODIUM azide Solution :Pure `N_(2)` is obtained by thermal decomposition of sodium azide `underset("Sod.azide")(2NaN_(3))to2Na+N_(2)`

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