Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 1

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Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at same room temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be

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Important Questions on States of Matter: Gases and Liquids

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 2

According to Charle's law :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 3

A sample of gas at

35 ° C & 1 atm

pressure occupies a volume of

3.75

litres. At what temp. should the gas be kept if it is required to reduce the volume to

3

litres at the same pressure :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 4

The best vaccum so far attained in laboratory is

10^{- 10} mm

of

Hg

. The number of molecules of gas remain per

{cm}^{3}

at

20 ° C

in this vaccum is :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 5

A hydrocarbon contains

10.5 g

of carbon per

gm

of

H

. One litre vapours of hydrocarbon at

127 ° C

and

1

atm pressure weighs

2.8 g

. The molecular formula of hydrocarbon is :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 6

120 g

of an ideal gas of molecular weight

40

are confined to a volume of

20

litre at

400 K

, then the pressure of gas is :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 7

A cylinder contains acetylene gas at

27 ° C

and

4.05 MPa

. The pressure in the cylinder after half the mass of gas is used up and temperature has fallen to

12 ° C

will be :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 8

The weight of

350 mL

of a diatomic gas at

0 ° C

and

2

atm pressure is

1 g

. The weight in

g

of one atom at

NTP

is :

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Beta Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>EXERCISE-1>Q 9

Oxygen is present in a litre flask at a pressure of

7.6 \times 10^{- 10} mm

of

Hg

. The number of oxygen molecules in the flask at

0 ° C

is :