Question # 1

Which of the following alkyl halide undergoes nucleophilic substitution reaction via the formation of a carboncation.

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1-chloro -2 methyl propane

2- chlro-2-methyl propane

2- chloro butane

1-Chloro, 3,3- dimethyl pentane

Which of the following products is obtained when but 2-ene is treated with perchloric acid.

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CH3CHO only

CH3COOH only

CH3CHO and CH3COOH

CH3CH2COOH + HCOOH

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

Ingold's isoprene rule states that in tepenoids isoprene units are joined.

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Head to tail

Head to Head

Tail to Tail

In a random order

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

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

Which of the following is the major process when neopentyl bromide is dehydrogenate with alcoholic potash.

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2- methyl -1- butene

2- methyl- 1- butene

2,3 -dimethyl butene

2- butene

Which of the following statements regarding phenols is not correct.

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Phenol ls are stronger acids than water and alcohols.

Phenol are weaker acids than carboxylic acids

Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate

Phenoxides ions are more stable than the corresponding phenol

Which of the following class of compounds follow the criteria of aromatically.

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The compounds must have high degree of unsaturation

they must have the property to undergo addition reactions

They must have the property to undergo substitution reactions

They must have the ability to sustain an induced current in NMR

Orion is polymer of.

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Styrene

CF2 = CF2

Vinyl chloride

Acrylontrile

Aromatic amine (X) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed with formula C2H3N (Y) was formed by reacting a compound (Z) with Cl2 in the presence of slaked lime . The compound (Z) is

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C6H5NC

CHCl3

CH3CH2OH

C6H5NH2

In propagation step the reaction intermediate of radical polymerization is

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Carbocation

Carbonion

Free radical

Carbene

Various compound corresponding to molecular formula C1H10 are.

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Functional isomers

Position isomers

Chain isomers

None of the abvoe

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 statements is not correct with respect to applications of Hammett equations.

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It develops a quantitative relationship between structure and reactivity

This equation on can be used to calculate the value of pK_a

This equation does not help to calculate the rate of some reactions

This equation has mechanistic implications

Co enzyme cna be separated from enzyme by

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Precipitation

Dalysis

Hydrolysis

Distillation

Indigotin is a dye obtained from indigo plant which belongs to the group of.

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Substantive dyes

Mordant dyes

Vat dyes

Disperse dyes

1-Butyne on oxymereuration -demercuration would give.

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Butanone

Butanal

Propanol and methanol

Propanoic acid and formic acid

Identify an oxygenated cyclic terpenoid

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a- pinene

Camphor

Citral

Geranial

Which of the following statements in not correct with respect to the important characteristics of aromatic compounds.

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They are usually cyclic compounds

They are resistant to usual addition reactions

They usually undergo substitution reactions

They are less stable

Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.

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2,4 Dinitrophenyl hydrazine

Nitrous acid

Benzoyl chlride

None of these

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