Question # 1

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 unit of Kc for the reaction N2 +O2 = 2NO will be

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mol dm-3

mol-1 dm+3

mol-2 dm+6

No units

A glass is full of water and contains 6.02 x 10²³molecules of H2O The mass of water molecules is.

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18 gm

90 g

120 g

180 g

Which of the following species has unpaired electrons in anti bonding molecular orbitals

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O2

N2

B2

F2

One mole of SO2 contains

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6.02 x 10²³atoms of oxygen

18.1 x 10²³atoms of SO2

6.02 x 10²³atoms of Sulphur

4 g atoms of SO2

Which of the following mixtures of liquids show negative deviation

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Methyl alcohol water

Hydrochloric acid water

Carbon di sulphide chloroform

Chlorobenzene bromobenzene

Vapour pressure of liquid depends upon

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Amount of liquid

Surface area

Temperature

Size of container

In azeotropic mixture showing positive deviation from Raoult's law the volume of the mixture is

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Slightly more than the total volume of the components

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

Solubility curve of CaCl26H2O shows

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Decrease in solubility with increase of temperature

Increase in solubility with increase of temperature

Discontinuous increase in solubility with temperature

No effect of temperature on solubility

NaCI and sand can be separated by one of the following without filtration

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Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

Which is not use of liquid crystals.

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Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

Gooch crucible is made of.

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Glass

Paper

Teflon

Procelain

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Le-Chatelier Braun principle is sometimes known as

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Law of mass action

Law of mobile equilibrium

Law of active mass

All of these above

In cubic and hexagonal closest packing which layer has different arrangement.

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First

Second

Third

Fourth

London dispersion forces are the only forces present among the

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecules of solid iodine

Molecules of hydrogen chloride gas

Gases exert pressure on the walls of the container becasue the gas molecules.

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Collide with each other

Collide with walls of container

Have definite volume

Obey the gas laws

The molecule having zero dipole moment is.

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NH3

CHCl3

H2O

BF3

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