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Q.

Generally metals react with acids to give salt and hydrogen gas.

Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?

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a

H2SO4

b

HCl

c

HNO3

d

All of these

answer is C.

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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 oxidising agent. It oxidizes the H2  produced to water and it self reduce to any of the Nitrogen oxides.
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