Question # 1

The percentage of methane in natural gas is

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50%

60%

85%

90%

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

Rates of organic reactions are

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Fast

Very fast

Slow

Non-reactive

Compounds having the same molecular formula, but different functional groups show

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Metamerism

Position isomerism

Chain isomerism

Functional group isomerism

The atom other than C in a hetrocyclic compound is called as

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Hetroatom

Hetroion

Hetromolecule

Hetroelement

The open chain organic compounds are called

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Linear compounds

Aromatic

Aliphatic

Both A and B

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0

1

2

3

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

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Nitration

Alkylation

Sulphonation

Acylation

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2, 2, 4-trimethylpentane

2, 4, 4-trimethylpentane

2, 4, 4-methyepentane

2, 2, 4-methylpentane

The process in which orbitals of different energies and shapes mix up with each other to give equivalent is called,

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Hybridization

Polymerization

Isomerisation

Carbonization

Which is a mixture of low boiling hydrocarbon

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Natural gas

Petroleum

Wood

Graphite

Select from the following the one which alcohol

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Those compound which have any atom other than C as member of rings are called as

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Monocyclic

Hetrocyclic

Aliphatic

Both a and b

The major portion of natural gas is

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Ethane

Propane

Butane

Methane

Homologues differ from each other by an integral number of

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CH₂groups

CH₃groups

CH groups

CH₄groups

Sp³hybridization occurs when carbon is bound to

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Four other atoms

Three other atoms

Two other atoms

One other atoms

Geographical survey of Pakistan estimates about billion tons of coal in Pakistan:

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182

183

184

185

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3

4

5

2

Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,

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Saturated

Un-saturated

Magnetic

Para-magnetic

Diversity of organic compounds in millions is:

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Four

Five

Six

Seven

Which one of the followings is a heterocyclic compound

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Cyclohexanol

Phenol

Pyridine

Anthracene

Which is not the poplar reaction

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Which of these always applies to a nucleophile

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It attacks a double bond

It has a lone pair of electrons

It is single atom

It is negatively charged

The chemist who synthesized urea form ammonia cyanate was:

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Berzelius

Kolbe

Wohler

Lavoiser

Fossil fuels consist of :

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Coal

Natural gas

Petroleum

All of these

The active part in a molecule is called

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Homologous series

Functional group

Chemical bonding

Ionic complex

Organic compounds resemble to those of inorganic compounds having same

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Ionic properties

Carbon forming long chain or rings

Chemical forces

Isomerism

When a compound X is passed through a dilute alkaline solution of KMnO₄the pink colour of solution is discharged. The compound X is possbibly

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Methane

Ethane

Ethene

Benzene

The gasoline with high octane No. has ______

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More knocking

Less knocking

No knocking

Only knocking

Identify the heterocyclic compound

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Toluene

Pyridine

Butanoic acid

Propenol

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ECAT Chemistry Chapter 18 Fundamental Principles of Organic Chemistry Online Test MCQs With Answers

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