Question # 1

Which substance has the greatest lattice energy.

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CuBr

MgO

KI

NaF

The freezing point of a solvent

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Will increase on adding a solute

Will decrease on adding a solute

Will note change on adding solute

None of the above

Which of the following is not a correct postulate of the kinetic theory of gases.

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The molecules are in random motion

The gaseous collisions are perfectly elastic

The average kinetic energies of different gases are equal at a particular temperature.

The pressure exerted on the walls of the container is due to inter molecular forces.

The sum of pH and pOH is aqueous solution is equal to.

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14

7

zero

pKw

Which of the following device is used to measure the surface tension.

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Polarimeter

Viscometer

Refractometer

Stalagnameter

Which of the following is an example of molecular solids.

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MgO

ZnO

Ice

Graphite

Ethylene belongs to.

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C_2v group

D_2h group

C₂ group

D_ah group

The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.

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l,l- l........-1

l........2, l -3.......-2l

l-l-2,..........-l

l-2,l-4, ............-4l

Which of the following statement is false regarding lyphilic sols.

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The colloidal particles show a linking for the dispersion medium

These are generally easy to prepare

These are more stable than lyophobic sols

The stability of the sols is mainly due to the electrical double layer

The height to which a liquid will rise in an open capillary tube is inversely proportional to.

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Temperature of the liquid

Surface tension

Density of the liquid

Air pressure

Which of the following symmetry element leaves the molecule or an object unchanged.

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Proper rotation

Improper rotation

Inversion axis

Identity

HS- is a conjugate base of.

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S2-

H2S

H2SO3

H2SO4

The degree of dissociation of weak acid increases with.

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Decreasing pressure

Increasing pressure

Increasing concentration

Decreasing concentration

The gases H2, N2, O2 and NH3 . H2 =2 , N2 = 28, O2 = 32 and NH3 =17 will effuse in the order.

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H2> N2> O2 > NH3

NH3 >O2 > N2 > H2

H2 > N2 > NH3 > O2

H2 >NH3 > N2 > O2

Which law of thermodynamics helps in calculating the absolute entropies of varies substances.

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Zeroth law

1st law

Second law

Third Law

The number of formula weight of the solute dissolved per dm3 of the solution is called.

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Mole fraction

Normality

Formality

Molaiity

The mole of photon is known as

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Quantum

Eienstein

Energy Packet

None of the above

Which of the following statement is not correct regarding the stern theory of charge on colloidal particles.

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The colloidal particle has a charge distribution at its surface.

In the immediate vicinity of the colloidal particles there is an excess of counter ions

The greater the concentration and charge of ions in the diffused electrical double layer. the larger is the thickness of the layer

At large distance from the colloidal particles, the concentration of co-ions and counter ions are almost equal

The half life period of any first order reaction.

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Is half the specific rate constant

Is independent of the initial concentration

Is always the same whatever the reaction

Is directly proportional to the initial concentration of the reactant

The reciprocal of the coefficient of viscosity in called.

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Density

Specific gravity

Fluidity

Conductance

The overall energy change during the Cannot cycle to.

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Equal to zero

Equal to Q

Equal to W

Maximum

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