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JEE Main Chemistry Class 12 The D and F Block Elements Part 1 Questions
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© examsnet.com
Question : 64
Total: 100
Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of :
[Online April 9, 2013]
C
r
O
3
C
r
C
l
3
C
r
O
2
C
l
2
C
r
2
O
3
Validate
Solution:
Solid potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride gives orange red vapours of a volatile oily liquid
C
r
O
2
C
l
2
K
2
C
r
2
O
7
+
4
N
a
C
l
+
6
H
2
S
O
4
⟶
2
K
H
S
O
4
+
4
N
a
H
S
O
4
chromyl
chloride
+
2
C
r
O
2
C
l
2
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