NEET Exam Model Paper 10

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Question : 75 of 180

Marks: +1, -0

Nitrogen can be purified from the impurities of oxides of nitrogen and ammonia by passing through

conc. HCl
alkaline solution of pyrogallol
a solution of K2Cr2O7 acidified with H2SO4
a solution of KOH (aq)

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