Question # 1

Sp³hybird orbitals are oriented at an angle of

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107.5°

108.5°

109.5°

103.5°

Incomplete oxidation of alkanes yields

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CO₂& carbon black

CO₂+ heat

CO and carbon black

CO + heat

Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called

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Wurtz reaction

Fitting reaction

Wurtz fitting reaction

None of these

Paraffins are also called

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Alkanes

Alkynes

Alkenes

None of these

Which of the following species participate in sulphonation of benzene ring?

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H2SO4

HSO4

SO3

SO^-₂

Replacement of hydrogen by NO₂group is called

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Sulphonatioin

Hydration

Nitration

Cracking

Kolb's method of alkanes production, is actually

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Hydrolysis

Catalysis

Electrolysis

Hydrogenation

The term aromatic was derives from

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Greek word

Latin

Russian

English

Substituted phenyl groups are called

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acyl groups

phenyl groups

Aryl groups

Alkyle groups

CnH_2nis the general formula of

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Alkanes

alkynes

None of above

Octane number can be changed by

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Isomerisation

Alkylation

Cyclisation

All of these

Most common reactions of benzene and its derivatives are

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electrophilic addition reactions

electrophilic substitution reactions

Nucleophilic addition reactions

Nucleophilic subtitution reactions

The correct order of reactivity of halogens with alkanes is

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l₂> Br₂> Cl₂> F₂

l₂> Cl₂> F₂> Br₂

F₂> Cl₂> l₂> Br₂

F₂> Cl₂> Br₂> l₂

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

Which gas is used for welding purposes

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Butane

Nitrogen

Methane

Acetylene

Mustard gas is a :

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Gas

Liquid

Solid

High boiling point

The C-C bond angles in benzene ring are

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119°

120°

121°

None

Write the name of following alkene CH₂= CH - CH = CH₂

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1,3 butadiene

Butra -1, 3-diene

Both a & b

None

Alkanes are soluble in all except

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Benzene

Ether

Water

Carbon tetra chloride

Which decolourizes the colour of Br₃

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CH₄

CH_3-CH₃

CH_3-CH_3-CH₃

CH₂₌CH₂

Which one of the following gases is used for artificial ripening of fruits

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Ethane

Ethyne

Methane

Propane

Alkanes have functional group :

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----X

--OH

----COH

No functional group

Nitroalkane are used in

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Fuel

Solvents

Organic synthesis

All of them

Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is

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1, 1-Dimethyl-3-butene

1,1,1-Trimethyl-3-propene

3,3,-Dimenthyl-1-butene

3,3,3,-Trimethyl-1-propene

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give

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Benzene

Cyclohexene

Benzene

Toluene

The method involved for electrolysis of Na or K salts of carboxylic acids

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Sabatier's sendrens reaction

Kolbe's method

Clemmensen

Wolf kishner reduction

To differentiate isomers we use

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n-

iso-

neo

All of them

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyle acetate

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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