Question # 1

The pi-electrons in the styrene are

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13

10

8

6

Ethane when completely halogenated in excess of chiorine can form

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Hexachloroethane

Dichloroethane

Pentachloroethane

1.1.2.2-terachloroethane

Substituted phenyl group are called

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Arene groups

Alkyl groups

Aryl groups

Acyl groups

A compound that has a nucleophilic carbon?

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C2H2

C2H4

C3H8

C6H6

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

Tertiary alcohols are the easiest to dehydrate because

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They form stable carbocation

They have less hydrogen

They have bigger size

They are polar

Which af the following compound reacts slower than benzene in the electrophilic substitution.

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Phenol

Nitrobenzene

Toluene

Aniline

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

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Substitution

Addition

Acid-base

Elimination

Which group activates the benzene ring

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-COOH

-COR

-CHO

-OH

Ethene is produced from ethyl chloride by reacting with alcoholic KOH. The process is called

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Hydrogenation

Dehydrogenation

Dehydrohalogenation

Oxidation

Baever's reagent is misture of

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HCI& ZnCl

Ageous bromine

Alkaline KMn4

Mix of Br2&KMnO4

Benzene cannot undergo the ------- directly

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

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

2-Propenol, on rearrangement, yields

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Propanal

Propanone

2-propano

Both A and B

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

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C10H8

C10H14

C10H10

C12H12

The addition of HCI to ethene gives?

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Chloroethane

1,2-dichloroethane

1.1-dichloroethane

2-chloroethane

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

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

Glyoxal molecule has?

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two carbonyl groups

One aldehydic and one carbonyl group

Two aldehydic groups

Two carboxyl group

Benzene reacts with Ethyl chloride in presence of AICls to give

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Benzalchloride

Benzyl chloride

Ethyl benzene

Benzotrichloride

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

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

Benzene has pi electron

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2

4

6

8

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