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CGP EDU Academic Team
Published on: August 14, 2026
A brown coloured mixture of two gases is obtained by the reduction of 6N nitric acid with metallic copper. This mixture on cooling condenses to a blue liquid which on freezing at — 30° C gives a blue solid. The correct choice for blue liquid or solid is.
Text Solution
Verified by ExpertsThe correct answer is:
D
(i) It is an acidic oxide and anhydride of HNO 2
N 2 O 3 + H 2 O 
2HNO 2
(ii) With alkali it forms nitrites
N 2 O 3 + 2NaOH 
2NaNO 2 + H 2 O
(iii) It can also be prepared by the action of 50% HNO 3 on arsenious oxide and then cooling to 250 K
All are correct here.
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