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Test Index
Class 11 NEET Physics Properties of Matter Questions
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© examsnet.com
Question : 58
Total: 89
The density of water at
20
∘
C
is
998
k
g
∕
m
3
and at
40
∘
C
is
992
k
g
∕
m
3
.
The coefficient of volume expansion of water is
(KN NEET 2013)
3
×
10
−
4
∕
∘
C
2
×
10
−
4
∕
∘
C
6
×
10
−
4
∕
∘
C
10
−
4
∕
∘
C
Validate
Solution:
As
ρ
T
2
=
ρ
T
1
(
1
+
γ
∆
T
)
=
ρ
T
1
1
+
γ
(
T
2
−
T
1
)
Here,
T
1
=
20
∘
C
,
T
2
=
40
∘
C
ρ
20
=
998
k
g
∕
m
3
,
ρ
40
=
992
k
g
∕
m
3
∴
992
=
998
1
+
γ
(
40
−
20
)
992
=
998
1
+
20
γ
or
992
(
1
+
20
γ
)
=
998
1
+
20
γ
=
998
992
or
20
γ
=
998
992
−
1
=
6
992
γ
=
6
992
×
1
20
=
3
×
10
−
4
∕
∘
C
© examsnet.com
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