1

### IIT-JEE 1985

Rate of diffusion of a gas is
A
directly proportional to its density
B
directly proportional to the square root of its molecular weight
C
inversely proportional to the square root of its molecular weight.
D
directly proportional to its molecular weight
2

### IIT-JEE 1984

Equal weights of methane and hydrogen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by hydrogen is
A
1/2
B
8/9
C
1/9
D
16/17
3

### IIT-JEE 1982

Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is
A
two times that of a hydrogen molecule
B
four times that of a hydrogen molecule
C
same as that of a hydrogen molecule
D
half that of a hydrogen molecule
4

### IIT-JEE 1981

The ratio of root mean square velocity to average velocity of a gas molecule at a particular temperature is
A
1.086:1
B
1:1.086
C
2:1.086
D
1.086:2

#### Questions Asked from States of Matter

On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
IIT-JEE 1986 (1)
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IIT-JEE 1985 (1)
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IIT-JEE 1984 (1)
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IIT-JEE 1982 (1)
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IIT-JEE 1981 (3)
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