MEDIUM
11th CBSE
IMPORTANT
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The ratio of van der Waal’s constant (a/b)  has the dimensions:

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Important Questions on States of Matter: Gases and Liquids

MEDIUM
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 18
The term that corrects for the attractive forces present in a real gas in the van der Waals equation is
EASY
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 19

The Van der Waals constant 'a' for different gases are given below:

Gas a (atm lit-2 mol-2)
O2  1.36
N2  1.39
CH4  2.25
NH3 4.17

The gas that can be most easily liquefied is

HARD
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 20
If helium is allowed to expand in vacuum, it liberates heat because
EASY
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 21
The vapour pressure of water at 300 K in a closed container is 0.4 atm. If the volume of the container is double, its vapour pressure at 300 K will be
HARD
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 22
Surface tension vanishes at
MEDIUM
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 23
If the four tubes of a car are filled to the same pressure with N2, O2, H2 and Ne separately then which one will be filled first?
HARD
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 24
The incorrect statement among the following is
MEDIUM
11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 5 - States of Matter: Gases and Liquids>TEST YOUR GRIP>Q 25
Temperature below which the gas does not obey ideal gas law is