States of matter

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States of matter

mcq type questions

If gas is expanded at constant temperature

1 point

The number of molecules of the gas increases

The kinetic energy of the molecules decreases

The kinetic energy of the molecules remains the same

the pressure increases

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One mole of a gas at S.T.P occupies 22.7 L .This fact is derived from

1 point

Avogadro's hypothesis

Dalton's Theory

Berzelius hypothesis

Laws of gaseous volume

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Which of the following is valid at absolute temperature?

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K.E of the gas becomes zerobut the molecular motion does not become zero

K.E of the gas becomes zero and the molecular motion also becomes zero

K.E of the gas decreases but does not become zero

none of the above

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Which is not true in case of an ideal gas?

1 point

It cannot be converted into a liquid

There is no interaction between the molecules

All the molecules of the gas move with the same speed

At a given temperature,PV is proportional to the amount of the gas

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4 g of an ideal gas occupies 5.6 liters of volume at 546K and 2atm pressure. What is its molecular weight?(R= 0.0821 L.atm/mol.K)

1 point

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A certain mass of a gas occupies a volume of 2 litres at STP. To what temperature the gas must be heated to double its volume, keeping the pressure constant?

1 point

100K

273 K

273°C

546°C

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_________ was the first scientist who expressed a relation between pressure and volume of a gas.

1 point

Robert Boyle

Charles

Avogadro

Gay -Lussac

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Absolute Zero is

1 point

273 C

273 K

-273 C

-273 K

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Charles Law deals with ______________ relationship

1 point

Temperature and volume

Pressure and volume

Pressure and temperature

Number of moles and temperature

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What is the value of gas constant? R.in Jmol–1 K–1

1 point

82.1

8.314 × 102

8.314

0.0821

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