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which of the following elements will have strongest Van Der Waal force of attraction between its molecules

A. hydrogen
B. oxygen
C. chlorine
D. nitrogen

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Correct Answer: C. chlorine
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The temperature recorded by Kelvin scale is

A. 0K
B. 273K
C. 373K
D. Absolute scale is unable to record this temperature

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Correct Answer: B. 273K
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One liter of an unknown gas weighs 1.25 grams at S.T.P, one possible formula for the gas is

A. CO2
B. CO
C. O2
D. SO2

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Correct Answer: B. CO
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If pressure on a gas is increased from 2 atm to 4 atm than its volume will decrease from

A. 6L to 4L
B. 8L to 2L
C. 3L to 1L
D. 4L to 2L

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Correct Answer: D. 4L to 2L
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A container with a porous wall has a mixture of H2, He, N2 and O2. Which of these gases will take maximum time in getting out of the container?

A. H2
B. He
C. N2
D. O2

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Correct Answer: D. O2
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If the temperature of the atmosphere is 30°C then which of the following will have highest average speed:

A. O2
B. H2
C. Ne
D. N2

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Correct Answer: B. H2
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I heard Islamian genius saying that glass must be a super cooled liquid. The reason that he might have in his mind is that glass has

A. definite volume
B. definite shape
C. crystalline structure
D. no crystalline structure

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Correct Answer: D. no crystalline structure
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