Question # 1

The vibration degrees of freedom for a linear and non liner poly atomic molecule of seven atoms each an respectively

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30 and 29

30 and 32

28 and 29

None of above

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 emission of light in a biological reaction is known as

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Fluorescence

Phosphorescence

Bioluminescence

Photolysia

If 20 ml of 0.5 N salt solution is diluted in one litre. what is the new concentration.

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0.01 N

0.001 N

1 N

10 N

For a given mass of a gas at constant temperature, if the value V becomes a times, the pressure will become.

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3P

P/3

9P

3P/T

The angle between corresponding planes forming the external surfaces of the crystal remains constant for a given substances This is known as.

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Steno's law

Henry's law

Bragg law

Pascal law

In proper rotation (Cn) an object is rotated through an angle of.

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a/n radians

2n/n radians

3n/n radians

4n/n radians

According to the Debye-Huckel theory of strong electrolytes, and ion moving in an atmosphere of oppositely charged ions experience a drag This effect is known as

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Aaymmetric effect

Electrophoretic effect

Inter ionic effect

Concentration effect

Which of the following orbitals does not make sense.

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6f

4f

7s

2d

A colloidal system in which a liquid is dispersed in a solid is called a/an

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Emulsion

Sol

Gel

Precipitate

A theoretical link between quantum mechanics and thermodynamic is.

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Electrochemistry

Kinetic theory of gases

Spectroscopic analysis

Statistical thermodynamics

The statement that heat cannot flow spontaneously from a colder to a hotter body is the result of.

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The first law of thermodynamics

The second law of thermodynamics

The third law of thermodynamics

Henry's law

The compound contains two types of X and Y its crystal structure is a cubic lattice with X-atoms at the corners of the unit cells and Y-atom t the body centre, The simplest formulae of this compound is.

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X2Y

XY

XY2

X8Y

Which of the following statements is not correct with respect to second law of thermodynamics.

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It helps in know the position of chemical equilibrium

It helps to know the position of chemical equilibrium

It determines the conversion of heat into work

It is based on Nerst heat theorem

Which of the following is an acceptable value fo the molecularity.

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0

2

6

3/2

Which of the following phenomena is not explained by the classical mechanics.

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Black body radiation

Photoelectric effect

Atomic and molecular spectra

Heat capacities of solids

All of the above

Which of the following is the cause of Brownian movement of colloidal particles.

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Convection currents int he fluid

Bombardment by the molecules of the dispersion medium

Setting of dispersed phase under gravity.

Thermal gradient in the medium

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 isotonic nucleotide X and Y have mass numbers 35 and 37 respectively if the atomic number of X is 17 the atomic number of Y will be.

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15

17

19

18

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

Which of the following solution has highest normality.

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1 N H2PO4

0.5 N H2SO4

6 g NaOH per 100 cm3

4 g NaOH PER 1000 cm3

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