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Question
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)?
Options
H2SO4
HCl
HNO3
All of these
Solution
HNO3
Explanation -
Out of the given options, only nitric acid when reacting with metals does not give hydrogen gas instead nitric acid is a very strong oxidising agent and it oxidises the hydrogen gas formed to water and thus hydrogen gas is not evolved.
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