Question # 1

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

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C6H6 + NH3

C6H6 + NH4

C6H6 + CH3Cl

C6H6 + CH3COCl

The stability of acromatic compounds decreases with ------- in the no. of its resonance structure

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Decrease

Increase

Remain constant

Partially decreases

Which compound was recognized the parent member of aromatic compounds

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Aniline

Phenol

Benzene

Toluene

The molecule of ethane possess which hybrization

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sp³

sp²

sp

sp²d

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

Odour of alkene is:

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Fruity

Odourless

Zarlic like

Irritating

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

Synthesis rubber is made by polymerization :

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Chloroform

Acetylene

Divinyl acetylene

Butene

Paraffins are also called

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Alkanes

Alkynes

Alkenes

None of these

Benzene does not undergo

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Benzene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

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

The method used only for the production of symmetrical alkanes

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Kolb's method

Clemmenen

Cannizzaro

Wolf kishner

Which of the following is not aromatic hydrogencarbon

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Benzene

Naphthalene

Toluene

Cyclohexene

Which one does not declourized KMnO₄

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Alkenes

Alkynes

Bezene

All above

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

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Elemination

Addition

Free radical substitution

Nucleophilic substation

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

When acetylene is passed through a copper tube at 300°C, it polymerizes to

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Polyacetylene

polyethylene

Benzene

None of these

B-B'-dichloroethyl sulphide is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Which class of compound is more reactive

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Alkane

Alkene

Alkyne

None

Hydrocarbons contain :

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Carbon only carbon

Hydrogen only

Carbon & hydrogen

Carbon , hydrogen & halogen

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

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Isomerization

polymerization

Hybridization

Resonance

The elimination of HX from adjacent carbon atoms is called

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Halogenations

Hydrohalogenation

Dehydrohalogenation

Hydration

Alkenes normally have ______ geometry

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Tetrachedral

Linear

Planer

None

During reaction of O₂and alkenes, a product:

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Glycol

Epxide

Halohydrin

Ethylene glycol

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

Formula of chloroform is:

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CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as

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Sabatier-senderens reaction

kolbes reaction

Cannizaro's reaction

Haloform reaction

The treatment of benzene with isobutene in the presence of sulphuric acid give

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isobutyl benzene

tert-Butyl benzene

n- Butyl benzene

no reaction

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