Question # 1

A terpenoid which has as alcoholic group in the molecule is.

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Citral

Camphor

Menthol

Carvone

Sterols are steroids having the functional gruup.

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Ketonic

Al;coholic

Phenolic

Aldehydic

Co enzyme cna be separated from enzyme by

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Precipitation

Dalysis

Hydrolysis

Distillation

SAN is a polymer of

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Styrene

Acrylonitrile

Both A and B

Vinyl chloride

Which of the following equations represent linear free energy relationship.

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Hammett equation

Taft equation

Helmholtz equation

Differential equation

Cyclic polymers of ethylene glycol formed by condensation are called.

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Crown ether

Brown ether

Cryptates

Both A and C

The compounds whose formation require a host compound and a guest compound are called.

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Exclusion compounds

Inclusion compounds

Crystal compounds

None of the above

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.

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Primary structure

Secondary structure.

Tertiary structure

Quaternary structure.

Sanger's reagent is

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Carbobenzyloxy chlride

Dimethyl amino sulphonyl chloride

I-Fluoro -2,4-dinitrobnzene

2,4- Dinitrophenyl hydrazine

Which of the following is capable of shown g optical isomersm.

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CH3COCOOH

CH3CHOHCOOH

Botha a and b

All of these

Which of the following does not represent Lewis base.

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Pyridine

NaNH2

PCl3

NaOH

1-Chlorobutane on reaction with alcohols potash gives.

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1- butane

1-butanol

2- butane

2- butanol

Recrystallization is the most common technique of purification of solid organic substances Which of the following statements is not related with characteristics of a suitable solvent.

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It dissolves the substance on heating

It readily allows it to separate out in the form of crystal on cooling

It does not react chemically with substance

It does dissolve the impurities.

Which of the following group will have hyper conjugation effect when attached to benzene.

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------ CH3

----C6H5

------C(CH3)3

---------CH(CH3)2

The number of optically active compounds in the isomers of C3H5Br3 is.

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1

2

3

4

Oxytocin, a pituitary hormone to

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Amino acid

Polypeptide

Protein

Conjugated protein

When the colourless liquid chlorobenzene is shaken with bromine water, the chlorobenzen becomes a yellow-orange colour. Which of the following is the best interpretation of this.

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An addition compound of chlorobenzene and bromine has been formed.

The chlorine atom has been replaced by a bromine atom

The bromine is mor esoluble in chlorobenzene than in water

A hydrogen atom has been replaced by a bromine atom

Which type of polymers the Vulcanised rubbers is.

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Linear

Cross jinked

Branch chain

Any one of these

Treatment of phenol with cold dilute nitric acid gives.

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Only o-nitro phenol

Only p-nitro phenol

2,4,6 -Teinitro phenol

Mixture of o-and p-nitro phenol

The IUPAC name of C2H3, CO , OC OC2H5 in

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Prepanoic anhydride

Ethanoic anhydride

Diketoethoxy ether

None of the above

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