Question # 1

Which statement is false.

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If a reaction is thermodynamically spontaneous it may occur rapidly

If a reaction is thermodynamically spontaneous it may occur slowly.

Activation energy is a kinetic quantity rather than a thermodynamic quantity.

If a reaction is thermodynamics spontaneous, it must have a low activation energy.

The reduction of an alkyne to alkene using Lindlar's catalyst results into

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Syn addition of hydrogen atoms

Anti addition of hydrogen atoms

A mixture obtained by ayn and anti addition of hydrogen which are equilibrium with each other

A mixture obtained by syn and anti addition of hydrogen which are not in equilibrium with each other.

Which of the following groups exert -1 effect.

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- NO2

- CN

-COOH

<C = 0

The compound (CH3)3COH according to IUPAC is known as.

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Tert Butanol

2,2 -Dumethyl -Propanol

2- Methyl -2-propanol

Tert Alcohol

Cytosine a pyrimidine base pairs with

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Guanine

Thymine

Adenine

Any of these

Trimethylamine is a weaker base than dimethylamine is explained by

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Steric effct

Resonance effect

Inductive effect

All above

Which of the following statements not correct with the concept of Bronsted concept of acids and bases.

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An acid can donate a proton

A base can accept a proton

This concept has many bases that have OH- ions

This concept is more general

Oxidative enzymes are responsible for

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Biological processes

Biological oxidation

Biological hydrolysis

Biological isomerisation

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

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Steam distillation

Chromatography

Ion-exchange

Sublimation

Casionic polymerization is initiated by

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BF3

NaNH2

Bul

Both b and c

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

The most stable carbonium ion is

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See butyl

n-butyl

Tert butyl

None of the above

Inorganic acids (HCl, HBr, HNO3 etc) have K value.

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< 1

>1

>10

<10

Gutta percha is

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Cis poly imprene

Trans -polyisoprene

Polyethylene

Polyisobutylene

a-pinene hydrochloride on warming rearrangements to form bornyl chloride

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Pinacol pinacolone

hofmann

Wagner Meerwein

Wolf

Orion is polymer of.

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Styrene

CF2 = CF2

Vinyl chloride

Acrylontrile

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

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1

2

4

3

The stationary and mobile phases in paper chromatography are.

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^{Liquid/Liquid}

Solid /Liquid

Liquid/Solid

Gas/solid

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

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Distillation

Sublimation

Solvent extraction

All above

Which of the following dye is used an antiseptic .

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Methyl orange

Mercurochrome

Alizarin

Bismarck brown

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