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Byju's Answer
Standard XII
Chemistry
Borax
Anhydrous bor...
Question
Anhydrous borax is:
A
N
a
2
B
4
O
7
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B
N
a
2
B
4
O
7
.
5
H
2
O
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C
N
a
2
B
4
O
7
.
10
H
2
O
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D
N
a
2
B
4
O
7
.8
H
2
O
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Solution
The correct option is
A
N
a
2
B
4
O
7
Anhydrous borax has formula
N
a
2
B
4
O
7
.
Anhydrous means no water of crystallisation.
Option A is correct.
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Similar questions
Q.
The % of boron in borax (
N
a
2
B
4
O
7
.10
H
2
O
) is
:
[
H
=
1
,
B
=
11
,
O
=
16
,
N
a
=
23
]
Q.
N
a
2
B
4
O
7.
10
H
2
O
is:
Q.
N
a
B
O
2
+
C
O
2
→
A
+
B
. A & B are as follows
Q.
Choose the products formed by action of
N
a
2
C
O
3
on
H
3
B
O
3
Q.
Titration of a
0.7439
g sample of impure
N
a
2
B
4
O
7
.10
H
2
O
(borax) requires
31.64
mL of
0.108
M
H
C
l
for the reaction. The result of this analysis in terms of percentage is (in nearest integer)
:
(Molecular weight of
B
=
11
g/mol)
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