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IIT JEE Advanced 2010 Paper 1
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Question : 54
Total: 84
Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is _____.
KCN ,
K
2
S
O
4
,
(
N
H
4
)
2
C
2
O
4
, NaCl ,
A
n
(
N
O
3
)
2
,
F
e
C
l
3
,
K
2
C
O
3
,
N
H
4
N
O
3
, LiCN
Your Answer:
Validate
Solution:
Three of them, that is, KCN,
K
2
C
O
3
and LiCN are basic in nature and their aqueous solutions turn red litmus paper blue.
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