Question # 1

In BeCl2, the covalent bond is formed due to overlap of

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sp -s

sp -p

sp2 -p

sp3 -p

Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when

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It is saturated

Is shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

Is is metastable

What happens to the enthalpy change when the coeffficients of a chemical equation are douubled

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It doubles

It becomes half

It does not change

It cannot be predicted

The comparative rates at which the solutes move in paper chromatography depend on.

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The size of paper used

Rf values of solutes

Temperature of the experiment

Size of the chromatographic tank used

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

12.04 x 10²³atoms of nitrogen gas is equal to.

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1 mol

2 mol

3 mol

4 mol

An aqueous solution of ethanol in water has vapour pressure.

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Equal to that of water

Equal to that of ethanol

More than that of water

Less than that of water

When 6d orbital is complete, the entering electron goes into.

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7f

7s

7p

7d

In zero order reaction, the rate is independent of

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

Melting of ice can be forwarded by the use of.

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LiCl

BeCl2

NaCl

Ag Cl

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

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

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

18 g glucose is dissolved in 90 g o water, The relative lowering of vapour pressure is equal to.

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1/5

5.1

1/51

6

Ascorbic acid is vitamin.

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A

B

C

D

Which is pseudo solid

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CaF2

Glass

NaCl

CaCl2

The substance used for decolorization of crystalline substance is

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G2O5

Chloroform

Animal charcoal

Soda ash

18 g glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to.

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1/5

5.1

1/51

6

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