Question # 1

Observed pressure is less than ideal pressure for any gas due to

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Intermolecular forces

Size of molecules

Boiling point of molecules

Both a and c

Which one of the following inter molecular forces are present in neon gas molecules.

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Hydrogen bond

dipole -Dipole attraction

London dispersion force

Hydrogen bonding and London dispersion force

Which of the following contains the same number of molecules as 9 g of water.

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2 g of hydrogen gas

14 g of nitrogen gas

32 g of oxygen gas

44 g of carbon dioxide gas

Keeping the temperature constant of the gas is expanded.

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Pressure will decrease

Temperature will increase

Kinetic energy of molecules will increase

No. of gas molecules increases

In a electrolytic cell the electrons flow from

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Cathode to anode

Anode to cathode

From cathode to anode or opposite, depending upon the nature of electrolyte

All of the above

The S.I. units for the molar heat capacity are

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

Which mixture of gases is used by the deep sea divers.

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Oxygen and nitrogen

Oxygen and helium

Oxygen and carbon di oxide

Oxygen and water vapours

When i₂present in the aquous layer in the form of I^-1₃foes to CCI₄layer, then the change in colour is from

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Purple to brown

Purple to green

Green to brown

Brown to purple

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

Which of the hydrogen halide has the highest percentage of ionic character.

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HCl

HBr

HF

HI

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

Which one of the following salts dissolved in water to form a solution with a pH greater than 7

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NaCl

CuSO4

Na2CO3

NH4Cl

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

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Double

One half

Four times

Remains constant

The Van der Waals' equation explain the behaviour of.

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Ideal gas

Real gas

Vapours

Non ideal gases

Ascorbic acid is vitamin.

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A

B

C

D

The electrode reaction of a voltaic cell can be reversed when

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Concentrations of solutions are changed

Temperature is increased

Electrodes are interchanged

Electric circuit is employed to supply the source of electricity

Which substance have delta E = Delta H and no pressure - volume work.

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Liquids only

Solids only

Gases only

Liquids and solids

When liquid water changes to ice its volume expands. The expansion in volume is.

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5%

9%

10%

18%

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