hydrogen gas is not evolved when most metals react with nitric acid. Give reason
Answers
Answered by
20
Answer:
It is because HNO3 is a strong oxidising agent . It oxidises the H2 produced to water and itself gets reduced to any or the nitrogen oxides .
Answered by
1
Explanation:
When metals react with nitric acid hydrogen gas is liberated.
Nitric acid is a very strong oxidizing agent.
So , it oxidizes the hydrogen gas formed during the reaction to form water and an oxide of nitrogen (
N
O
,
N
2
O
,
N
O
2
etc.
).
The reaction for it is:-
Z
n
+
4
H
N
O
3
→
Z
n
(
N
O
3
)
2
+
2
N
O
2
+
2
H
2
O
Exception:-
Magnesium and manganese react with very dilute nitric acid to liberate hydrogen gas.
The reaction for it is:-
M
g
+
2
H
N
O
3
→
M
g
(
N
O
3
)
2
+
H
2
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