Question # 1

Cracking done at low pressure and with a catalyst is called _______ cracking

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Thermal

Catalytic

Steam

None of them

In which molecule carbon atom is sp²hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

At present oil refineries in Pakistan are:

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One

Two

Three

Four

1-butene an 2-butene are an example of

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Chian isomerism

Positional isomerism

Metamerism

Functional group isomerism

Carboxylic acid, ester, amide and amino groups are shown. Which is the correct description of these functional groups

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Angle 120° is observed in molecules :

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CH₄

CH_3-CH₃

CH -CH

CH_{2 =}CH₂

The major portion of natural gas is

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Ethane

Propane

Butane

Methane

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

Peat before conversion to bituminous coal is converted to

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Lignite

Anthracite

Asphalt

None

Which gasoline is better?

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Of low boiling point

Of low molecular mass

Of high octane

All of these

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0 1

0 2

1 1

1 2

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1

2

3

4

Identify the compound formed, when ethylene combines with water in the presence of 10% sulphuric acid and HgSO₄as catalyst

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Carbinol

Methanol

Ethanol

Glycol

The structure of benzene is

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Hexagonal

Pyramidal

Square planer

Tetrahedral

Which statement is true about a free radical

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An atom with a positive charge

An atom with a negative charge

An atom with a lone pair of electrons

An atom with unpaired electron

The essential component of organic compound is

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O

C

P

N

Select from the following the one which alcohol

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The self linking property of carbon is called as

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Linking polymerization

Addition

Catenation

Elimination

Source of organic compounds primarily is:

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Plants

Animals

Minerals

A & B

General formula of carbocyclic acids is:

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RCOH

RCOR

RCOOR

R-OH

Identify the compound which has a bond angle of 109.5°

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Ethyne

Ethere

Methane

Benzene

The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

The active part in a molecule is called

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Hetroatom

Functional group

Chemical bond

Ion

Due to the bacterial action on wood it is converted into

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Peat

Lignite

Bituminous coal

Anthracite

The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct

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It is costly

It damages the engine

Pb is difficult to obtain in bulk quantities

The combustion product, lead, causes air pollutions

Catenation is a process in which carbon shows the properties of making

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Multiple bonds

Hybridization

Long chains or rings of carbon atom

Showing isomerism

A free radical reaction takes place in three steps, initiation, propagation and terminations. Which of the following expression represents a propagation step

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Condensation

Dehydration

Dehydrogenation

Hydrogenation

The compounds which have any atom other than Carbon atom, in rings are called as

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Monocyclic

Heterocyclic

Homocyclic

None of the above

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

Functional group of ketones is:

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---CHO

---CO---

---C≡ N

---COOH

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