Question # 1

What is the activation energy of a reaction whose rate constant increases by a factor of 100 upon increasing the temperature from 300 K to 360 K.

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27

35

42

69

Which of the following is not a general property of amino acids.

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They have high m.p. and b.p

They are soluble in water

Their dipole moments are high

They are amorphous solids

a-terpioneol is obtained on hydration of which of the following with dilute H2SO4.

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Citral

Myrcene

Linalool

Limonene

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

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Perfumes

Terpenoids

Flavonoids

Alkaloids

Compounds consisting of two or more interlocked rings are called.

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Inclusion compounds

Cage compounds

Catenanes

Crown other

The addition of Br2 to cis 2-butene produces.

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(+) 2,3 - dibromobutane only

(-) 2,3 -dibromobutane only

(+) 2,3, dibromobutane

meso-2,3, -dibromobutane

Monomer of Nylon -6 is

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Adipic acid

Hexamethylenediamine

Caprolactam

All of these

The electrophile in the sulphonation of benzene is.

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SO3

SO3H

HSO4

SO2

An optically active compound

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_{Must contain at least favour carbons}

When in solution rotate the plane of polarized light

Most always contain an asymmetric carbon atom

In solution always give negative reading in polarimetre

When FeSO4 is added in the sodium extract the compound formed is.

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Only Na4[Fe (CN)6]

Only Fe (OH)2

Only Na2So4

Mixture of all these

What is the possible number of optical isomers for a compound contained 2 dissimilar asymmetric carbon atoms.

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2

4

6

8

Vitamin D1 is chemically known as

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Ergocalciferol

Tocopherol

Aserphthol

Phylloquinone

When of the following steps is involved in structure determination of an organic compound.

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Purification of compund.

Qualitative and quantitative analysis of elements present

Determination of molar mass

All above steps

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

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CH3COCOOH

CH3CHOHCOOH

Botha a and b

All of these

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

Enfleurage process is used to extract the essential oils from

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Back of plant

Seeds of plant

Leaves of plant

Flowers of plant

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

Toluene is o/p -orienting with respect to an electrophilic substitution reaction due to.

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+1 effect of the methyl group.

+1 as wellas +H effect of the methyl group

Hyper conjugatin between the methyl group and phenyl ring.

+ R effect of the methyl group

It is possible to distinguish between optical isomers.

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Using chemical tests

By mass spectrometry

By IR spectroscopy

By polarimetry

A salt solution is treated with chloroform drops.Then it is shaken with chlorine water, chloroform layer become violet solution contains.

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NO2 ion

NO3 ion

Br ion

I- ion

Which of the following pair on aldol condensation followed by dehydration gives methyl vinyl ketone.

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HCHO and CH3COCH3

HCHO and CH3CHO

CH3CHO and CH3CHO

CH3COCH3 and CH3COCH3

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