Question # 1

The glow of the yellow phosphorous as a result of slow oxidation in air is called.

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Chemiluminescene

Luminescence

Biolumineacence

Photolysis

In an isochoric process

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Energy remains constant

Volume remains constant

Pressure remains constant

Temperature remains constant

Which of the following type of lattice has maximum numb of atoms per unit cell.

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Simple cubic

Body centred cubic

Face centred cubic

All of them

Which of the following solids is a better conductor of electricity.

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Pore NaCl cyrstal

Diamond

Graphite

Marble pieces

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

A catalyst increases the rate of a reaction because.

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It provides the necessary energy to the colliding molecules to cross energy barrier

It decreases the heat of the reaction

It decreases the order of the reaction

It provides a different path of lower activation energy.

At constant temperature , the decrease in Halmholts free energy is equal to.

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Decrease in entropy

Increase in entropy

Reversible work done by the system

All types of work done

The expression of specific conductance is given by

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Ls= I/R , l/A

Ls = L I/A

Ls = I/L , A/l

LS = r l/A

The variation of enthalpy of reaction with temperature is given by.

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Hesse's law

Clasisus Clapayron equation

Kirchoffs equation

Arrhenious equation.

Which of the flowing operator combination would yield eight value equation

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d/x (sin x)

d/dx (cos x)

d /dx (sin 4x)

d /dx (cos 4x)

d/dx (e^x)

Which of the following compounds does not show dipole moment.

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CH3OH

HBr

CCl4

CHCl3

A compound with an congruent melting point decomposes on heating into.

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A liquid of the same composition as the solid

A new solid phase and a solution with a compositional from that of the solid phase

A new solid phase and a solution with the same composition as that of the solid phase

A solution of fixed composition

Which of the following is not an intensive property.

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Melting point

Refractive index

Entropy

Density

Linear molecules have ____________ axis of rotation

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C1

C2

C

C3

Out of seven crystal system, how many can have body centered unit cell.

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3

4

2

7

In quantum theory, which of the following tells us that the prediction of quantum mechanics must pass smoothly into those of classical mechanics as we progress in a continuous way from microsopic to macroecopic.

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Uncertainty principle

Correspondence principle

Probability distribution

Aufbau principle

Which of the following methods gives the number average molecular weight of a polymer.

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Light scattering method

Osmotic method

Sedimentation equilibrium method

Viscosity method

The rate constant of a reaction depends on

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Concentration of reactants

Concentration of products

Temperature

Time

A colloidal system in which both the dispersion phase and dispersed phase are liquid is.

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Smoke

Emulsion

Whipped cream

Mist

The molarity of a 500 mL solution containing 4 g NaOH

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0.1

0.2

0.3

0.4

Iso-osmotic solutions are those which have the same.

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Vapour pressure lowering

Osmotic pressure

Molality

Boiling point elevation

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