Question # 1

Boyle's law doesn't fail even :

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Temperature is extremely high

Pressure is extremely high

Mixture of gas is taken

All of above

The graph between pressure and volume at constant temperature for a gas is

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Isobaric

Isothermal

Isotherm

None of above

Which of the following is the simplest form of matter?

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Gaseous state

Liquid state

Solid state

All of above

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?

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Temperature is lowered and pressure is increased

Temperature is increasedand pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

Which of the following will have the same number of molecules at STP ?

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280 CM³ of CO² and 280 CM³ of N₂O

11.2 dm3 of O₂ and 32 g of O₂

44 g of CO₂ and 11.2 dm³ of CO

28 g of N2 and 5.6 dm³ of oxygen

According to Boyle's law. which parameters give a straight line parallel to x-axis, when we plot a graph between

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V and T

P and V

P and 1/V

P and PV

Cooling happens under the Joule Thomson Effect due to sudden :

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Contraction

Absortption

Expansion

All of above

Gases of air, always remain in random motion and do not settle due to

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Difference in molecular masses of air gases

Difference in partial pressure of gas molecules

Unequal number of different gas molecules

Elastic collision of gas molecules

Gases shows uniform behavior toward their :

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Internal conditions

External conditions

Internal and external conditions

None of above

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be

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Remain unchanged

Doubled

Reduced

Increased four times

A real gas obeying van der Waals' equation will resemble ideal gas if :

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both 'a' and 'b' are large

both 'a' and 'b' are small

'a' is small and 'b' is large

'a' is large and 'b' is small

Which Statement about gases is not correct?

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They spread throughout the vessel

Pressure is due to collision

There are larger spaces between the molecules

Molecules are arranged regularly

Cooling happens under the Joule Thomson Effect due to sudden

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Contraction

Absorption

Expansion

All of above

According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:

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V and T

P and V

P and 1/V

P and PV

All gases can be compressed by :

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of the above

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

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Y-axis

Z-axis

X-axis

None of above

In Boyle's law which of the following pair is variable

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Temperature and quantity of a gas

Pressure and Volume

Volume and quantity of a gas

Pressure and quantity of a gas

For a gas obeying Boyle's law if pressure is doubled, the volume becomes

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Remains constant

Double

One half

None of above

Gases of air always remain in random motion and do not settle due to :

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Difference in molecular masses of air gases.

Difference in partial pressure of gas molecules.

Unequal number of different gas molecules.

Elastic collision of gas molecules.

The molar value of CO₂is maximum at :

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STP

127°C and 1 atm

0°C and 2 atm

273°C and 2 atm

In gases and liquids, temperature is the measure of

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Average translational kinetic energies of molecules

Average vibrational kinetic energies of molecules

Average rotational kinetic energies of molecules

None of above

Keeping the temperature constant, if the gas is expanded

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kinetic energy of molecules will increase

Number of gas molecules increases

Temperature will increases

Pressure will decrease

Gases show uniform behaviour towards their

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Internal conditions

External conditions

Internal and external conditions

None of above

Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?

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At high pressure, the gas molecules move in one direction only.

At high pressure, the collisions between the gas molecules are increased manifold.

At high pressure, the volume of gas becomes insignificant.

At high pressure, the inter molecular attraction become significant.

A graph between P and 1/V at constant temperature and number moles of a gas meets the

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y-axis

x-axis

origin

none of above

Which of the following is the simplest form of matter?

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Gaseous state

Liquid State

Solid State

All of above

Which statement about gases is not correct ?

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The spread throughout the vessel.

Pressure is due to collision

There are large spaces between the molecules.

molecules are arranged regularly.

Number of molecules in one dm³of water is close to :

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6.02/22.4

12.04/22.4 *10²³

18/22.4*10²³

55.6*6.02*10²³* 10²³

In Boyle's law which of the following pair is variable :

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Temperature and quantity of a gas.

Pressure and volume

Volume and quantity of a gas.

Pressure and quantity of a gas.

In gases and liquids, temperature is the measure of :

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Average transnational kinetic energies of molecules.

Average vibrational kinetic energies of molecules.

Average rotational kinetic energies of molecules.

None of above

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