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p-Block Elements: Groups 15 and 16
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Nitrogen compounds: ammonia, oxides of nitrogen, nitric acid
JEE Main level
Single correct option
Difficulty 2 of 3
pn171
Zinc reacts with dilute nitric acid to give
Zn
(
NO
X
3
)
X
2
,
N
X
2
O
and water. The number of electrons gained by nitrogen per molecule of
N
X
2
O
formed is
A
10
B
2
C
4
D
8
Answer: D
Nitrogen goes from
+
5
in
HNO
X
3
to
+
1
in
N
X
2
O
, a gain of 4 electrons per N atom.
N
X
2
O
contains two N atoms, so
2
×
4
=
8
electrons are gained.
Practice p-Block Elements: Groups 15 and 16
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