Question # 1

The reagent which can be used to distinguish acetophenone from benzophenone is.

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2,4 -dinito phenyl hydrazine

Li AIH4

Benedict reagetn

I2 and Na2CO3

The number of hydrogen bond present in G -C pair is

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1

2

4

3

Albumin is classified as

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Simple protein

Conjugated protein

Lipoprotein

Derived protein

Phenol on reaction with ethanoic anhydrides in the presence of sodium ethanoate gives.

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Phenyl benzoate

Ethyl benzoate

Phenyl ethanoate

Phenyl methyl ether

a -amino acids when heated alone form

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Cyclic lactum

a-b-unsaturated acid

Fatty acids

Diketopiperzines

Compounds consisting of two or more interlocked rings are called.

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Inclusion compounds

Cage compounds

Catenanes

Crown other

Suppose the activatin energy of a certain reaction is 250 kj/mol, If the rate constant at T1 =300 K is k1 and the rate constant at T2= 320 K is ks, then the reaction is ______ times faster at 320 K than at 300 K

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3 x 10^-29

0.067

525

15.0

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

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Citral

Myrcene

Linalool

Limonene

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

Which of the following statements are correct for Linear polymers.

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Linear polymers may be condensation as well as addition polymers

Structure is well packed in nature

Linear polymers have higher density higher melting point and higher tensile strength

All are correct

The most suitable method of separation in mixture of o-and p- nitrophenol is.

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Steam distillation

Chromatography

Ion-exchange

Sublimation

Amino acids have

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Acidic group

Basic group

Both of these

None of these

Alkaline hydrolysis of chloroform produces.

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HCCO

HCOO - + CO

H3COH

CHCL2 OH

Presence of nitrogen in organic compound to tested as.

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Nitrogen gas

NH3

NO

Amide

Hydrolysis of nucleoprotein result in the formation of.

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Proteins

Nucleic acids

Both A and B

They do not hydrolyse

A mordants is substance which in

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Coloured

Leuco -base of a dye

Fixes dye on the fabric

All of these

Which of the following statements is not correct. with respect to resonance.

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The position of atomic nuclei mus be same

The limiting structures must have same number of paired and unpaired electrons.

The energy of the various limiting structures must contribute equally

All above

Carbon and Hydrogen are estimated by

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Liebig's method

Kjeldhal's method

Carries method

None of the above

Vitamin D1 is chemically known as

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Ergocalciferol

Tocopherol

Aserphthol

Phylloquinone

Essential oils are purified by which of the following methods.

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Steam distillation

Sublimation

Crystallization

Fractional crystallization

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

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Inductive effect

Resonance effect

Electrometric effect

All above

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