Question # 1

C-H bond length in the benzene is

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0.99A°

1.09A°

1.12A°

1.34A°

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?

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FeCl2

Cl+

FeCl-4

Cl2

Dehydrohalogenation of alkyl halides happens in the presence of

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Pd

Ni

Zn

KOH/alcohol

Ethyl and methyl groups are equidistant in a chain, the preference is given to?

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Ethyl

methyl

both ethyl and methyl

methyl mostly

When 1-butene reacts with bromine, the product formed will be

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1, 3-dihydroxy butane

But-1, 2-diol

1, 3-dihydroxy butan-diol

1,2-dibromo butane

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

Ethane when completely halogenated in excess of chiorine can form

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Hexachloroethane

Dichloroethane

Pentachloroethane

1.1.2.2-terachloroethane

Benzene in the presence of AICl3 produces acetophenone when reacts with

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AcetyI chloride

EthyI benzene

Acetic acid

Ethanoic acic

Naphthalene has two fused aromatic ring of carbon atom the molecular formula

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C10H8

C10H14

C10H10

C12H12

The reaction that generates an ionic bond is

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Halogenation of ethene

polymerization of ethene

Hydrogenation of ethyne

Reaction of ethyne withs sodamide

Which of the following is electrophile for alkylation?

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NO+2

SO3

R+

Both a & b

Aniline is the derivative of the benzene containing the

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Hydroxyl group

Amino group

Amido group

Imido group

Ethene can give all of the following reactions except

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Addition

Free radical substitution

Hydrohalogenation

Hydration

During the nitration of benzene the nitrating agent is

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NO3

NO2+

NO2-

HNO3

The addition of HCI to ethene gives?

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Chloroethane

1,2-dichloroethane

1.1-dichloroethane

2-chloroethane

The origin ofacidic nature of alkyne is?

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small size of C

Small size of H

polarity of triple bond

sp hybridization

Glyoxal molecule has?

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two carbonyl groups

One aldehydic and one carbonyl group

Two aldehydic groups

Two carboxyl group

The reaction of alkyl halide in the presence of alcoholic KOH is

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Substitution

Addition

Acid-base

Elimination

The compound used to distinguish the ethyne and ethene is

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Alkaline KMnO4

Ammonical AgNO3

Bromine water

Tollen's Reagent

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