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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
pn024
The gases evolved when copper reacts with (i) cold dilute
HNO
X
3
and (ii) hot concentrated
HNO
X
3
are, respectively,
A
NO
X
2
and
NO
B
N
X
2
O
and
NO
X
2
C
NO
and
N
X
2
O
D
NO
and
NO
X
2
Answer: D
3
Cu
+
8
HNO
X
3
(
dil
)
3
Cu
(
NO
X
3
)
X
2
+
2
NO
+
4
H
X
2
O
and
Cu
+
4
HNO
X
3
(
conc
)
Cu
(
NO
X
3
)
X
2
+
2
NO
X
2
+
2
H
X
2
O
. Dilute acid gives
NO
; concentrated acid gives
NO
X
2
.
Practice p-Block Elements: Groups 15 and 16
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