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Manipal Entrance Test 2014 Chemistry Paper
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© examsnet.com
Question : 54
Total: 60
Out of the following redox reactions
I
.
NH
4
NO
3
Δ
–
–
–
–
–
–
🢖
N
2
O
+
2
H
2
O
II
.
NH
4
NO
2
Δ
–
–
–
–
–
–
🢖
N
2
+
2
H
2
O
III
.
PCl
5
Δ
–
–
–
–
–
–
🢖
PCl
3
+
Cl
2
disproportionation is not shown in
I and II
II and III
I and III
I, II and III
Validate
Solution:
I
.
NH
4
−
3
+
NO
3
−
+
5
–
–
–
–
–
–
🢖
N
2
O
+
1
+
2
H
2
O
It is a redox reaction but not a disproportionation reaction. Since, different N-species are involved.
II
.
NH
4
+
−
3
NO
2
+
3
–
–
–
–
–
–
🢖
N
2
+
2
H
2
O
same as (I)
III
.
PCl
5
+
5
−
1
–
–
–
–
–
–
🢖
PCl
3
+
3
−
1
+
Cl
2
0
Thus, it is also not a disproportionation reaction.
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