Question # 1

Example of linear geometry

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XeF2

F2 and HgCl2

CdI2 AND Ag Cl3

All of the above

Layer of the C -atom in graphite are hold together by

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Covalent bonds

Free electrons

Ionic bond

Van Dar Waals forces

The noble gases which does not I do not form any clathrates is.

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He

Ne

Argpm

Both He and Ne

TLC belongs to which of the following chromatographic techniques.

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Ion exchange

Partities chromatography

Adsorption chromatography

Gel permeation

The increase in boiling points of noble gases from He to Xe is due to the

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Decreases in ionization energy

Increases in polarizability

Increase in electron affinity

Increase in atomic volume

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

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Polarimeter

Viscometer

Refractometer

Stalagnameter

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 action of all the relations of all the organism to their environment is called

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Biology

Botany

Ecology

Archiology

Hypo is used in photography to.

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Reduce AgBr to metallic silver

Remove silver a silver salt

Remove undecomposed silver bromide as soluble complex

Remove reduced silver

The common oxidation state of elements of group V A is.

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-3

+3

+5

Any above

The pKa of acetic acid is 4.74 which implies that.

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pH of 1N solution is 4.74

At pH 4.74 the dissociation of acetic acid is maximum

At pH 4.74 half of the acetic acid molecules are dissociated in the solution.

At pH 4.74 the dissociation of acetic acid is minimum.

Dibornae is used

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Fro high energy fuel

For welding torches

as reducing agent

All above

Which of the following substance acts as gaseous pollutant.

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NO

NO2

CO

SO2

All above

The size of E coli bacteria is._____________ nm

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75000

2000

200

5

According to Arrhenius theory an acid is defined as substance which

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Accepts and electron pair

Donatees H+ ion in ammonia

Contains Cl- ions

Furnishes H3O + ion in water

The product obtained on heating n-heptane with Cr2O3 ____Al2O3 at 600 ^oC is.

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Cycloheptane

Methyl cyclohexane

Benzene

Teluene

Urea an enzyme used to estimate urea is a

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Hydrolytic enzyme

Oxidative enzyme

Reductive enzyme

Iso me rising enzyme

The intensity of magnetization produced per unit strength of the applied magnetic field is called magnetic susceptibility., which of the following statements is not related with this phenomenon.

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Confirmation of structure of given compound

Complex storeochemistry

Diamagnetic nature of molecules

Paramagnetic nature of molecules.

The vapour pressure of a liquid

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Always increase's with temperature

Always decreases with temperature

Is independent of temperature

Increase up to the boiling point

The process of removing disolved impurities from a colloidal system, by means of diffusion through a suitable membrane under the influence of an electric field , is called.

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Electrosmosis

Electrodialysis

Electrophoresis

Peptization

Valence bond theory is also called as

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Electron pair theory

Band theory

Electron gas theory

Electron pool theory

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 elements is most electropositive.

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C

N

O

Be

The change of chemical potential of any component with temperature an constant P and composition, is euqal to.

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Partial molar enthalpy of that component

Partial molar volume

Partial molar free energy

Negative of the partial molar entropy

Which of the following interaction is involved in solid phase extraction technique.

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Van der Waals forces

Dipolar attraction

H bonding

All of above

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

Which substance is used as filler or additive in paper making.

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Starch

Glucose

Cellulose

Maltose

Which of the following technique describes titrations in which a standard iodine solution is need.

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Iodometry

Iodimetry

potentiometry

Argentometry

What cast iron has modular or spheroidal graphite?

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Ductile iron

Gray iron

White iron

Raw iron

Organic farming is the technique of raising crops through uses of.

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Manures

Biofertilizers

Resistant varieties

All of these

O2 molecule is.

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Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

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