Question # 1

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

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1892

1830

1947

1979

Polymerization of ethane take place at pressure of 100 atm and a temperature of

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200°C

400°C

600°C

800°C

The Total coal resources of Pakistan are estimated to be

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184 billion

184 million tones

1.84 billion tounes

1.84 million tonnes

The presence of a double bond in a compound in the sign of:

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Saturation

Unsaturation

Subsitution

None

Which gas is produced by treating CaC₂with water

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Methane

Ethane

Acetylene

HCI

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4-methyl pentene

2-methyle-1-butene

2-methyl propane

None of the above

The reaction-method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halide

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

Physical properties of alkanes increase with increase of all physical constants except

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Boiling points

Melting points

Density

Solubility

Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

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Formula of chloroform is:

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CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

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Ethyle chloride

Ethyle alcohol

Carboxylic acid

None of these

Acetylene is used in the manufacture of

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Rubber

Plastic

Ethyle alcohol

All of these

Which of the following is not aromatic hydrogencarbon

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Benzene

Naphthalene

Toluene

Cyclohexene

Complete combustion of alkane yields

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CO₂+ H₂O

CO₂+ heat

CO + H₂O heat

CO₂+ H₂O + heat

The order of reactivity of halogen acids towards alkenes

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HCl > HBr > Hl

HBr > HCl > HI

HCl > HBr

HI > HBr > HCl

Octane number can be changed by

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Isomerisation

Alkylation

Cyclisation

All of these

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

Synthesis rubber is made by polymerization :

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Chloroform

Acetylene

Divinyl acetylene

Butene

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

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H₂SO₄

Ni

Fe₂O₃

Al₂O₃

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

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AlCl₃

HNO₃

BeCl₂

NaCl

B-B'-dichloroethyl sulphide is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

When alkyl is treated with chlorine in the presence of sunlight

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1,3 dichloroproduct is formed

1,4 dichloro product is formed

1,3,5 trichloro product is formed

Only alkyl group is substituted

the unreactivity of alkanes is based upon

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Inertness of sigma bond

Non-polarity of the bonds

Both A and B

None of above

The three alternate single and double bonds in the benzene ring are called

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Conjugate bonds

Resonating bonds

Both A and B

None of above

If we remove one hydrogen atom from an alkane we obtain a group called

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Acetyle group

Formyle group

Alkyle group

Ketyle group

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2-bromonitrobenzene

2-nitrobromobenzene

1-bromonitrobenzene

1-nitrobromobenzene

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

The geometry of acetylene is

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Angular

Bent

Trigonal

Linear

Benzene does not undergo

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

The general formula of alkane is

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C_nH_2n+2

C_nH_n

C_nH_2n

C₂H_2n-1

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