Question # 1

The extinction co efficient has the units.

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cm2 mol -1

cm3 mol-1

mol cm-3

mol cm-1

Which of the following has cubic structure.

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Sodium chloride

Potassium Chloride

Diamond

All of above

Which of the following pairs of fundamental particles are present in equal numbers in a neutral atom.

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Proton and neutron

Proton and positron

Electron and proton

Neutron and electron

Which of the following item is not symmetry element.

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Pllane of symmetry

Inversion centre

Improper rotation

Optical activity

The Langmuir adsorption iso therrn shows that the amount of adsorbed gas per gram of the solid is equal to.

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ap/1+bp

ap+1/1-bp

1+ap/1-bp

a(1+bp)

Which of the following statement is not true with respect to photo chemical reactions.

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These take place in the presence of light

Free energy of these reactions may be positive or negative

Light intensity affect these reactions

Temperature has significant affect n rate of these reactions

The branch of chemistry which deals with the rate of reaction as well as mechanism is known as

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Wave mechanism

Classical thermodynamcis

Chemical kinetics

Phtochemistry

The large increase in the rate of a reaction on rise in temperature is due to.

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The lowering of activation energy

The decreases in mean free path

The increase in collision frequency

The increase in the number of molecules having more than the threshold energy

Wlhich of the following can act as a protective colloid

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Gelatin

Silica gel

Oil in water emulsion

All three

In C4-axis of rotation, an object in rotated through an angle of.

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120^o

180^o

100 ^o

90^o

One ppm solution of NaOH Contain 1000 mg of the solute per how much of the volume of the solution.

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1000 mL

100 mL

10 mL

1 mL

The addition of As to Ge makes the latter a

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Metallic conductor

Ionic conductor

Intrinaic conductor

Extrinsic semiconductor

The rate at which a substance reacts depends on its.

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Molecular mass

Active mass

Equivalent mass

Molar mass

Which of the following reactions have small enthalpy change.

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NaOH with HCl

NaOH with CH3 COOH

HCl with NH4 OH

None of these

Which of the following has the highest lattice energy

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LiCl

NaCl

KCl

CaCl

Visible light is just a portion of radiation emitted by atoms.Which of the following statements is not related with visible light.

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visible light is electromagnetic in nature.

It travels with the speed of light

It is a mass

The wave number of light is directly proportional to its wave length.

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

In terms of number of phases (p) components (C) and degree of freedom (F) the phase rule is expressed as.

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P + C = F + 2

F = P+ C - 2

P + F= C + 2

P - F = C = 2

Which of the following statement is not related to MOT

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Atomic orbitals lose their identities

MOTgives as idea of denationalization

MOT uses all the orbitals and elections

It treated bond as purely covalent

The number of gram equivalents of the solute per dm3 of the solution is called.

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Formality

Normality

Molality

Molarity

The tyndall effect is not observed in

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Suspensions

Emulsions

Colloidal solutions

True solutions

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