Question:
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :
Updated On: Apr 28, 2025
- $N_2O$ and $NO_2$
- $N_2O$ and NO
- NO and $N_2O$
- $NO_2$ and $N_2O$
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The Correct Option is A
Solution and Explanation
$Zn$ reacts with dil. $HNO _{3}(20 \%)$ to form nitrous oxide $\left( N _{2} O \right)$
$Zn$ reacts with conc. $HNO _{3}(70 \%)$ to form nitrogen dioxide $\left( NO _{2}\right)$
$4 Zn +10 HNO _{3}{\text{( dil.)}} \longrightarrow 4 Zn \left( NO _{3}\right)_{2} N _{2} O +5 H _{2} O$
$Zn +4 HNO _{3}{\text{( conc )}} \longrightarrow Zn \left( NO _{3}\right)_{2}+2 NO _{2}+2 H _{2} O$
$Zn$ reacts with conc. $HNO _{3}(70 \%)$ to form nitrogen dioxide $\left( NO _{2}\right)$
$4 Zn +10 HNO _{3}{\text{( dil.)}} \longrightarrow 4 Zn \left( NO _{3}\right)_{2} N _{2} O +5 H _{2} O$
$Zn +4 HNO _{3}{\text{( conc )}} \longrightarrow Zn \left( NO _{3}\right)_{2}+2 NO _{2}+2 H _{2} O$
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Concepts Used:
Nitrogen
- Nitrogen is the 7th element of the periodic table between carbon and oxygen.
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- It is a combination of all living tissues. Since it is a component of DNA and part of a genetic code, it is a necessary element of life.
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