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  4. Which of the following metal evolves hydrogen on reacting with cold dilute HNO3 ?

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Q. Which of the following metal evolves hydrogen on reacting with cold dilute $HNO_3$ ?

The p-Block Elements - Part2

Solution:

Magnesium and manganese are the metals that produce hydrogen with dilute nitric acid $Mg + 2HNO_3 \rightarrow Mg (NO_3)_2 + H_2$