KcetS Block ElementsKCET 2018MCQ+1 / -02018Very pure $\mathrm{N}_2$ can be obtained byAthermal decomposition of ammonium dichromateBtreating aqueous solution of $\mathrm{NH}_4 \mathrm{Cl}$ and $\mathrm{NaNO}_2$Cliquefaction and fractional distillation of liquid airDthermal decomposition of sodium azideCheck AnswerClear SelectionReveal AnswerShow Explanation
