JEE Main Chemistry question

Which of the following metal evolves hydrogen on reacting with cold dilute HNO?

(A)Fe
(B)Cu
(C)Al
(D)MgCorrect

Answer: (D)

Solution

Dilute nitric acid is generally an oxidising acid, so it reacts with most metals to give oxides of nitrogen (NO, NO, etc.) rather than hydrogen gas. Magnesium (and manganese) are notable exceptions that liberate H even with cold,

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Question ID VK-137251