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Q.

Which metal reacts with nitric acid and hydrogen is evolved?

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a

Calcium

b

Potassium

c

Magnesium

d

Sodium

answer is B.

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Detailed Solution

Hydrogen gas is not evolved when a metal reacts with nitric acid. It is because HNO3 is a strong oxidizing agent. But magnesium. (Mg) and manganese (Mn) react with very dilute HNO3 to evolve H2 gas.

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