P-Block Elements Ques 570

Question: Brown colour in HNO3 can be removed by

Options:

A) adding Mg powder.

B) boiling the acid.

C) passing NH3 through acid.

D) passing air through warm acid.

Show Answer

Answer:

Correct Answer: D

Solution:

Nitric acid decomposes to give NO2 which is brown 4HNO34NO2+2H2O+O2 When air is passed through acid the reaction proceeds towards left hand side and brown colour diminishes.



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