Question # 1

H-Bond has a preferred bonding direction like

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Ionic bond

Covalent bond

Co ordinate bond

None of these

Which of the following techniques involves ion exchange phenomenon.

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Size exclusion chromatography

Ion exchange chromatography

GLC

HPLC

At high temperature nitrogen combines with calcium carbide to give

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Calcium cyanide

Calcium cyanamide

Calcium nitride

Calcium cabonate

The formula of borax glass is.

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Na2B4O7 10H2O

Na2B4O7 5H2O

Na B4 O7

None of above

The forces which holds the atoms together in a molecule is called

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Ionic bond

Covalent bond

Co ordinate bond

Chemical bond

Which of the following is not an extensive property.

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Work

Entropy

Free energy

Volume

What typical penetrator is used in Brinell hardness test

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10 mm ball

1.6 mm diameter ball

20^o needle

None of these

Which of the following groups exert -1 effect.

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- NO2

- CN

-COOH

<C = 0

The group of steel are water hardened tool steels.

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Groups S

Groups W

Groups O

Group F

Tetra halides do not undergo hydrolysis

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C

Si

Sn

Pb

Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.

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CH3COOH

NH+4

H2SO-3

H4P2O7

Which of the following linear polymer.

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Polypeptide

Protein

Starch

Phenol formaldehyde resin

The noble gas used or treatment of cancer is

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Helium

Argon

Radon

Krypton

The law of trinds was proposed by

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Dobereiner

Newlands

Lother Mayer

Chancourtois

Which of the following is a mode of controlling pollution in big cities.

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Cleanliness and less use of insecticides

Proper disposal of organic wastes, sewage and industrial effluents

Broader roads and shifting of factories out of the residential areas

All of above

Pick out the incorrect statement for XeF4

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XeF4 disproportionate violently with water

It is used as fluorinating agent

It has octahedral structure for geometry

It oxidizes I to I₂

Which of the following is not a chemical pollutant.

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Solid waste

Noiso

Insecticides

Liquid waste

Solid substances consist of an ordered any of ions and solid as a whole is electrically.

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Conductor

Neurtal

Acidic

Basic

The commonly used catalyst in the manufacture of H2SO4

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Fe2O3 with a little CuO

v2O5

Platinized asbestos and MgSO4

All above

Which of the following configuration of an ionic species represents psedue noble gas configuration.

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ns2

ns2 np6

ns2 np6 nd 10

ns2 np3

The nature of bonds in compounds of carbon and silicon is mostly

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Covalent

Electrovalent

Metallic

Both A and B

Finely divided iorn combines with CO to give

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Fe(CO)3

Fe2 (CO)9

F33(CO)12

Fe(CO)6

The electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

Which of the following is an important aspect of industrial ecology.

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Minimising air emissions

Minimising liquid waste

Recycling after use

All above

Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.

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Chi square test

F -Test

Student's test

Coefficient of variance

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

The percentage of nitrogen in urea is.

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36%

46%

55%

65%

The process of transfer of genetic message from DNA to m-RNA is known as

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Refplication

Translation

Transcription

Transference

Compounds HCN and HNC are.

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Tautomers

Metamers

Functional isomers

Conformers

The ionic product equilibrium constant is.

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Ka

Kb

Kc

Kw

The reverse of photo chemical reaction is called.

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Phosphorescence

Chemiluminescence

Fluorescence

Photscnaitization

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