Question # 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

The molecules of a gas show more deviation from ideal behaviour at low temperature, because

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Attractive force dominate at low temperature

Kinetic energies are increased

Collisions become less frequent

Densities of the gases increase

The molar boiling point constant is the ratio of the elevation of boiling point to .

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

The substance which decrease the activity of a catalyst is called.

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Promoter

Activator

Inhibitor

Positive catalyst

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

When water freezes, its volume increase.

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12%

9%

15%

18%

27g of Al will react completely with how much mass of O2, to produce Al2O3.

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8 g of oxygen

16 g of oxygen

32 g of oxygen

24 g of oxygen

Total pressure of mixture of two gases is.

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The sum of their partial pressures.

The difference of their partial pressures

The product of their practical pressures

The ratio of their partial pressures

Solvent extraction is an equilibrium process and is controlled by.

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Law of mass action

The mount of solvent used

The amount of solute

Distribution law

The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as.

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Voltaic cell

Denial cell

dry Cell

Electrolytic cell

Isomorphic crystals show

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Same chemical properties

Same physical properties

Same crystalline form

Same melting point

Azeotropic mixture

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Obey Raoult's law

Do not obey Raoult's law

Boils at low temperature only

Boils at high temperature only

When fast neutron carries nuclear reaction with nitrogen it ejects aprticles.

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Alpha

Gamma

Beta

Nil

Which statement about Gooch crucible is incorrect.

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It is made up of porcelain

Quick filtration occur by using suction filtering apparatus

All the chemicals which reacts with paper can be filtered.

Filter medium used in this crucible consists many folds of filter paper only.

One of the following liquids has lowest vapour pressure at 32°C. Indicate that liquid

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Ether

Chloroform

Ethanol

Water

Which one of the following has no tendency of form coordinate covalent bond with H+

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NH3

H2O

CH4

CH3OH

At constant temperature in a given mass of and ideal gas.

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The ratio of pressure and volume remains constant

Volume always remains constant

Pressure always remains constant

The product of pressure and volume remains constant

Which is not use of liquid crystals.

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Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

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