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Question
Chemistry
On heating compound (A) gives a gas (B) which is constituent of air. This gas when treated with H 2 in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:
Q. On heating compound (A) gives a gas (B) which is constituent of air. This gas when treated with
H
2
in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:
1913
247
JEE Main
JEE Main 2020
The p-Block Elements - Part2
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A
(
N
H
4
)
2
C
r
2
O
7
B
P
b
(
N
O
3
)
2
C
N
a
N
3
D
N
H
4
N
O
2
Solution:
Basic gas (C) must be ammonia (NH
3
). It means (B) gas should be
N
2
which is formed by heating of compound (A).
(1)
(
N
H
4
)
2
C
r
2
O
7
⟶
Δ
N
2
↑
+
C
r
2
O
3
+
4
H
2
O
↑
(2)
P
b
(
N
O
3
)
2
⟶
Δ
P
b
O
+
2
N
O
2
↑
+
2
1
O
2
↑
(3)
2
N
a
N
3
⟶
Δ
2
N
a
+
3
N
2
↑
(4)
N
H
4
N
O
2
⟶
Δ
N
2
↑
+
2
H
2
O
↑
So, (A) should not be
P
b
(
N
O
3
)
2
