Chemistry
State why hydrogen is liberated when zinc reacts with dil. HCl but not with dil. HNO3.
Nitric Acid
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Answer
As zinc displace hydrogen from dil. HCl, hence, hydrogen is liberated when zinc reacts with dil. HCl
Zn + 2HCl (dil.) ⟶ ZnCl2 + H2
However, when zinc reacts with dil HNO3, no hydrogen is obtained as nitric acid being a strong oxidising agent decomposes to form nascent oxygen which oxidizes the hydrogen produced to water.
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