Question # 1

The equation which relates the reaction rates and equilibrium constants of many reactions is known as.

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Taft equation

Hammett equation

Differential equation

Linear equation

Peppermint oil contains.

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Menthol

Thymol

a-pinene

Comphene

Which of the following compounds has highest dipole moment.

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Dichloromethane

Chloroform

Chloromathane

All above

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

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

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1

2

3

4

Urea an enzyme used to estimate urea is a

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Hydrolytic enzyme

Oxidative enzyme

Reductive enzyme

Iso me rising enzyme

Biogical role of nucleic acid doe snot include

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Genetic continuity

Protein syathesis

Hybridization

Mutation

Organic substance responsible for the smell of the Flowers etc are grouped together in chemistry as.

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Perfumes

Terphenoids

Flavonoids

Alkaloids

When propyne is treated with equeous H2SO4 in the presence of HgSO4 the functional isomer of the major product obtained in.

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Propanal

Acetone

Propane 2 -nl

Propanol

Polyamide jinkage is present in

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Nylon

Silk

Protein

All of these

Vet days are generally applied to the fabric in the form of.

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Mordants

Leuco base

Oxidised base

Dispersed dyes.

Which one of the following woul dmake an S_N2 mechanism more likely

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Bulky substituents near the halogen

A polar solvent

A tertiary carbocation intermediate

A reactive nucleophile

In the reaction RCO2Na + Na OH (CaO) ______ RH, we eliminate carboxylate group as.

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CO2

Na2CO3

-CO

CaCO3

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

Which of the following statement is not correct with respect to limitations of Hammett equation.

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It is only applicable to aromatic systems

Only applicable to aliphatic systems

It is not valid for m-substituent

Among the following a good solvent for a Grignard reagent formation would be.

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t- butanol

dimethyl ether

difiuoro ethane

tetrahyudroform

In which polymer the strength of inter molecular forces is maximum

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Elastomers

Thermoplastic

Fibre

Cross linked polymer

A molecule is said to be chiral

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If it contains plane of symmetry

If it contains centre of symmetry

If it can be superimposed on its mirror image

None of the above

Which of the following reaction cannot be used for the synthesis of a amino acids.

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Gabriel phthalimide

Streckers synthesis

Sorensen synthesis

Schmidt synthesis

Select the major product obtained from the addition of HBr to I -Methyl cyclohexene

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1-bromo -2- methyl cyclohexane

6- bromo-i- methyl cyclohex -i- ene

3- bromo -1- methyl cyclohex - 1- ene

I-bromo -I- methyl cyclohexane

Which of the following techniques is involved in purification of organic compound.

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Distillation

Sublimation

Solvent extraction

All above

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