Question # 1

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

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3

5

6

7

Compounds having same molecular formula but different structures are said to be

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Monomers

Isomers

Metamers

Tautomers

The percentage of methane in natural gas is

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50%

60%

85%

90%

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

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182

183

184

185

Coal heated in the absence of air of about 500 - 1000°C is converted to

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Coke

Coal gas

Coal tar

All above

Self linkage of carbon to produce long chains

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isomerism

Polymorphism

Polymerization

Catenation

Which gasoline is better?

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Of low boiling point

Of low molecular mass

Of high octane

All of these

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

Vital force theory was rejected by

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Berzellius

Kolbe

Wholer

Lavoiser

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

Which is not a fossil fuel

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Petroleum

Coal

Natural gas

None of them

Select from the following the one which alcohol

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Polythene is a polymer of

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Ethane

Ethene

Acetone

Propylene

Hybridzation explain the --------- of orbitals

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Type of bonding

Shapes

Shape and type of bonding

None of above

The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

Identify the heterocyclic compound

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Toluene

Pyridine

Butanoic acid

Propenol

The functional group isomer of dimethylether is

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Ethyl alcohol

Propyl alcohol

Diethyl ether

Butyl alcohol

Similarity in properties of different organic compounds give rise to the under standing of ______

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Polymerization

Non-polar nature

Homologous series

Isomerism

Which of the following contains single bonds

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Benzene

Alkyne

Alkene

Alkane

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

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1, 5-pentadiene

Penta-1, 4-diene

1, 1-pentadiene

1, 4-pentene

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

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

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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A nuclophile must

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Be an atom

A group of atoms

Have a lone pair

Be negatively charged

Which of the following gases is used for illuminating purpose?

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Methane

Ethane

Propane

Butane

The quality of petroleum is determined by

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Decane number

Octane number

Nexane number

None of these

The functional group of acid amide is

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Linear geometry is present in:

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Sp³

Sp²

Sp

D²sp³

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

Hydrocarbons contain

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C and S only

C and H only

C, H, and O only

C, H, O and N only

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