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Tardigrade
Question
Chemistry
Which of the following statement(s) is/are correct when a mixture of NaCl and K2Cr2O7 is gently warmed with conc. H2SO4 ?
Q. Which of the following statement(s) is/are correct when a mixture of
N
a
Cl
and K
2
C
r
2
O
7
is gently warmed with conc.
H
2
S
O
4
?
2108
269
IIT JEE
IIT JEE 1998
The d-and f-Block Elements
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A
A deep red vapours is formed
26%
B
Vapours when passed into
N
a
O
H
solution gives a yellow solution of
N
a
2
C
r
O
4
37%
C
Chlorine gas is evolved
20%
D
Chromyl chloride is formed
17%
Solution:
4
N
a
Cl
+
K
2
C
r
2
O
7
+
6
H
2
S
O
4
→
Chromyl chloride(red vapour)
2
C
r
O
2
C
l
2
+
4
N
a
H
S
O
4
+
2
KH
S
O
4
+
3
H
2
O
C
r
O
2
C
l
2
+
4
N
a
O
H
→
Yellow solution
N
a
2
C
r
O
4
+
2
N
a
Cl
+
2
H
2
O