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Class 11
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Physics
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Thermal Properties of Matter
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Change of State
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Humidity, Absolute Humidity, Relative Hu...
Humidity, Absolute Humidity, Relative Humidity,Specific Humidity
13 Mins
Physics
Language
Rate
REVISE WITH CONCEPTS
Introduction to Water Cycle and Related Terms
Example
Definitions
Formulaes
>
Humidity, Dew Point and Fog
Example
Definitions
Formulaes
>
QUICK SUMMARY WITH STORIES
Types of Hygrometer and its working
3 mins
Humidity, Dew Point and Fog
4 mins
Important Questions
When
0
.
1
5
k
g
of ice at
0
o
C
is mixed with
0
.
3
0
k
g
of water at
5
0
o
C
in a container, the resulting temperature is
6
.
7
o
C
. Calculate latent heat of melting of ice.
(Specific heat of water is
4
.
1
8
6
×
1
0
3
J
K
g
−
1
).
Hard
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>
In a pressure cooker the cooking is fast because.
Easy
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>
Calculate the heat required to convert
3
k
g
of ice at
−
1
2
o
C
kept in a calorimeter to steam at
1
0
0
o
at atmospheric pressure. (Given: specific heat of ice
=
2
.
1
0
0
×
1
0
5
J
k
g
−
1
K
−
1
, specific heat of water
=
4
.
1
8
6
×
1
0
6
J
k
g
−
1
, latent heat of fusion of ice
=
3
.
3
5
×
1
0
5
J
k
g
−
1
and latent heat of steam
=
2
.
2
5
6
×
1
0
6
J
k
g
−
1
) .
Hard
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>
Latent heat of fusion of ice is:
Easy
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>
Define latent heat of vaporization.
Easy
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>
How much heat energy is gained when 5 kg of water at
2
0
∘
C
is brought to its boiling point?
Medium
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>
What is the effect of increase in pressure on the boiling point of a liquid ?
Easy
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>
You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.
Medium
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>
Give a reason for the following observations:
(
a
)
Naphthalene balls disappear with time without leaving any solid.
(
b
)
We can get the smell of perfumes sitting several metres away.
Medium
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>
The average thermal energy for a mono-atomic gas is : (
k
B
is Boltzmann constant and
T
, absolute temperature)
Medium
NEET
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>