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Byju's Answer
Standard X
Chemistry
Extraction of Aluminium
During electr...
Question
During electrolysis of aluminium, which of the following substance is used as an electrolyte?
A
A
l
2
O
3
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B
A
l
2
O
3
,
N
a
3
A
l
F
6
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C
A
l
2
O
3
,
N
a
3
A
l
F
6
,
C
a
F
2
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D
None of the above
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Solution
The correct option is
D
A
l
2
O
3
,
N
a
3
A
l
F
6
,
C
a
F
2
The substance which is used as an electrolyte during electrolysis of aluminium is
A
l
2
O
3
,
N
a
3
A
l
F
6
,
C
a
F
2
.
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Similar questions
Q.
The purpose of adding
N
a
3
A
l
F
6
to
A
l
2
O
3
during electrolysis is :
Q.
Assertion :In the metallurgy of aluminium, purified
A
l
2
O
3
is mixed with
N
a
3
A
l
F
6
or
C
a
F
2
. Reason:
N
a
A
l
F
6
or
C
a
F
2
lowers the melting point of mixture and increases its conductivity.
Q.
During the electrolytic extraction of aluminium, purified alumina is mixed with
N
a
3
A
l
F
6
and
C
a
F
2
. Why?
Q.
Cryolite,
N
a
3
A
l
F
6
is added to
A
l
2
O
3
in Hall-Heroult process to ____ m.p. and to ___________ electrical conductivity.
Q.
Aluminium is extracted from alumina
(
A
l
2
O
3
)
by electrolysis.
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