Question # 1

Which of the following is an electrophile

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Bromine

KBr

NH₃

Benzene

The major components of coal gas are

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Hydrogen and methane

Ethane and carbon monoxide

Nitrogen and ethane

Ethane and carbon dioxide

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

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Methyl alcohol

Ethyl alcohol

Ethyl hydrogen sulphate

Methyl hydrogen sulphate

The formula of esters is

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The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

Peat before conversion to bituminous coal is converted to

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Lignite

Anthracite

Asphalt

None

Which of the following pair contains isomers of each other

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Propanoic acid and propanone

Acetone and acetaldehyde

Ethyl alcohol and diethyl ether

Methyl alcohol and dimethyl ether

Gasoline is a mixture of hydrocarbons containing carbon atoms

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5 to 10

5 to 8

5 to 12

5 to 11

The major portion of natural gas is

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Ethane

Propane

Butane

Methane

Which of the following gases is used for illuminating purpose?

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Methane

Ethane

Propane

Butane

The percentage of methane in natural gas is

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50%

60%

85%

90%

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Condensation

Dehydration

Dehydrogenation

Hydrogenation

Which is not a nucleophile

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Benzene

Chlorine

Ethene

Ethanol

Rates of organic reactions are

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Fast

Very fast

Slow

Non-reactive

General formula of carbocyclic acids is:

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RCOH

RCOR

RCOOR

R-OH

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

The functional group of acid amide is

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Replacement of hydrogen atom by - SO₃H group in benzene is called

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Nitration

Alkylation

Sulphonation

Acylation

The formula of ketone is

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None of these

Due to the bacterial action on wood it is converted into

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Peat

Lignite

Bituminous coal

Anthracite

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3

4

5

2

Which is a mixture of low boiling hydrocarbon

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Natural gas

Petroleum

Wood

Graphite

Which one of the followings is a heterocyclic compound

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Cyclohexanol

Phenol

Pyridine

Anthracene

At present oil refineries in Pakistan are:

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One

Two

Three

Four

Quality of fuel is judged from its octane number. The best fuels are

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Straight chain hydrocarbons

Branched chain hydrocarbons

Cyclic compounds

Compounds containing benzene ring

The distillation of coal at high temperature and in absence of air is called

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Vacuum distillation

Normal distillation

Fractional distillation

Destructive distillation

The general formula for alkenes is

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C_nH_2n+1

C_nH_2n+2

C_nH_2n

C_nH_2n-2

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

The catalyst,. which is used as specialist for cracking, are

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Aluminates

Alumlnosilicates

Aluminium slats

All can be used

How many structural acid cis-trans isomers are there for dichloroprepe, C₃H₄Cl₂

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3

5

6

7

Which of the following is not a hydrocarbon

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Butane

Methyl benezene

Acetylene

Glucose

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