Question # 1

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

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Formality

Normality

Molality

Molarity

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

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Polarimeter

Viscometer

Refractometer

Stalagnameter

A gas obeying the van Waals equation will closely resemble and ideal gas if

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The parameters 'a' and 'b' are small

'a' is small but 'b' is large

'a' is large but 'b' is mall

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.

A unit cell having dimension , a = b c, alpha, beta, gama = 90^o is known as.

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Cubic

Hexagonal

Orthorhombic

None of them

Wlhich of the following can act as a protective colloid

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Gelatin

Silica gel

Oil in water emulsion

All three

For assciated liquids, the value of d/M n x 10⁸ should be (where d is the density, M is the molar mass and n is the coefficient of viscosity)

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Zero

Infinte

Higher than 70

Less than 70

Which of the following is a natural polymer

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Nylon

Leucite

Cellulose

Polystyrene

In the process of electrosmosis

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Colloidial particles move towards the electrodes

Both colloidal particles and dis persons medium move

Only dispersion medium moves to carry the current

Positively charged colloidal particles move, but negatively charged particles remain stationary

The photoelectric effect is the ejection pf electrons from the surface of metal when light falls on it. Which of the following statements is not correct about the phenomenon.

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The kinetic energy of photo electron depends upon the frequency of the incident radiation

Electrons are ejected only when the frequency of light exceeds a certain threshold value

The higher the energy of the photon greater the kinetic energy of the ejected electron.

The threshold frequency of all the metals is same.

The extinction co efficient has the units.

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cm2 mol -1

cm3 mol-1

mol cm-3

mol cm-1

A device which is used to measure the interracial angle is known as

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Voltmeter

Potentiometer

pH Meter

Goniometer

Which of the following process always involve the decrease in oxidation number.

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Hydrolysis

Elecomposition

Oxidation

Reduction

A process in which no heat enters leaves the system is called.

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Isochoric

Isobaric

Adiabatic

Reveraible

The overall energy change during the Cannot cycle to.

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Equal to zero

Equal to Q

Equal to W

Maximum

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

The oxidation Number of I in HIO4 is.

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+6

+ 7

+ 3

+ 14

Which of the following item is not symmetry element.

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Pllane of symmetry

Inversion centre

Improper rotation

Optical activity

Poise is a unit of.

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Refractive index

Optical activity

Fluidity

Viscosity

The efficiency of a reversible heat engine depends only on the

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Temperature of the heat sink

Temperature of the heat source

Temperature of the heat source and sink

Pressure of the fluid

Which of the following unit cells has least symmetry.

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Monocline

Cubic

Triclinic

Tetragona

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