Question # 1

Which one of the following has the same number of electrons as an alpha particle.

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H

He

H+

Li+

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

When concentration of one product is removed at equilibrium stage, in which direction it moves to reestablish equilibrium.

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Forward

Reverse

Neither forward nor reverse

Equally move in both direction

The net change in a chemical reaction is same whether it takes place directly or indirectly is

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Henry's law

Charles's

Hess's lass

Graham's law

Bromine has isotopes

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2

4

8

6

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded by H2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

Stronger the oxidizing agent, greater is the

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oxidation potential

Reduction potential

Redox potential

E.M.F of cell

Stoichiometric calculations cannot applied to reversible reactions because.

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Product again changes to reactant

Less product is formed

Reaction goes only in one direction

Products do not disappear.

What has a mass equal to that of one mole of water.

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22.4 dm3 of water

One mole of steam

One molecule of water

Two moles of hydrogen molecules and one mole of oxygen molecules.

Dipole moment of CO2 is.

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1.25 D

1.85 D

3.1 D

Zero

The molal boiling point constant is the the ratio of the elevation in boiling point to.

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

Which of the following will have the same number of molecule at STP.

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280 cm3 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

Vapour pressure of a substance does not depend upon.

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Temperature

Intermolecular forces

Surface area

Physical state of water

Which is not is state function

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Enthalpy

Entropy

Pressure

work

The spreading of fragrance of a rose or scent in air is due to.

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Effusion

Diffusion

Osmosis

Evaporation

The boiling point of water at the top mount Everest is.

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59^oC

69^oC

83^oC

75^oC

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

In lead accumulator cathode is made up of.

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Pb

Pb coated with PbO2

PbSO4

Mixture of Pb and PbO2

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