Question # 1

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

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Propane

Ethane

Iso-butane

N-butane

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Electrophilic substitution

Free radical reduction

Isomerisation

Nucleophilic substitution

The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

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4-Bromobenzyl cyanide

4-Cyanobenzyl chloride

4-Cyanobenzyle cyanide

4-Bromo 2-cyanobenzyl chloride

How many monochlorobutanes will be possible on chlorination of n-butane?

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1

2

3

5

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?

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HCl + anhyd. Zncl₂

NaCl

PCl₅

SOCl₂

What is the total number of different chloroethanes of formula C₂H_6-nCl_npossible (n may be 1 to 6)

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6

8

9

10

Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated

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Which of the following compounds on oxidation gives benzoic acid?

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Chlorophenol

Chlorotoluene

Chlorobenzene

Benzyl chloride

The order of reactivity of an alkyl halide (R-X) for a particular alkyl group is

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Iodide > bromide > chloride

Chloride > bromide > iodide

Bromide > chloride > iodide

Bromide > iodide > chloride

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Electronphilic substitution

Electrophilic addition

Free radical substitution

Nuclephilic substitution

Alkyl halides on treatment with aqueous KOH give

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Phenol

Alcohol

Aldehyde

Ketone

For which mechanisms, the first step involved is the same:

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E₁ and E₂

E₂and SN₂

E₂ and E₁

E1 and SN₁

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NH₃ HCl

KCN in C₂H₅OH NaOH

KCN in C₂H₅OH HCl

HCN NaOH

The reactivity order of alkyl halides for a paricular alkyl group is

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Fluoride > chloride > bromide > iodide

Chloride > bromide > fluoride > iodide

Iodide > bromide > chloride > fluoride

Bromide > iodide > chloride > fluoride

The reaction of an alkyl halide with RCOOAg produces

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Ester

Ether

Aldehyde

Ketone

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

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NO₂makes the electron rich ring at ortho and para positions

NO₂withdraws electrons at metaposition

NO₂donate electrons at m-position

NO₂withdraws electrons at ortho and para position

When primary amine reacts with chloroform in ethanolic KOH, then the product is

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An isocyanide

An aldehyde

A cyanide

An alcohol

When chloroform is boiled with NaOH, it gives

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Formic acid

Trihydroxymethane

Acetylene

Sodium formate

Which one of the following in mainly responsible for depletion of ozone layer?

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Methane

Carbon dioxide

Water

chloroflurocarbons

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

On warming with silver powder,chloroform is converted into

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Acetylene

Hexachloroethane

1,1,2,2-tetrachloroethane

ethylene

Alkanes may be prepared by the reaction of alkyl halides with

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Alcohol

Carboxylic acid

Grignard reagents

None of these

SN2 reaction can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

Alkyl halides react with Mg in dry ether to form

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Magnesium halide

Grignard's reagent

Alkene

Alkyne

Which one of the following will have the maximum dipole moment

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CH₃F

CH₃Cl

CH₃Br

CH₃l

A reaction in which an atom or a group of atoms replaces an atom or a group of atoms in the molecule of a substance is known as

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Addition reaction

Condensation reaction

Elimination reaction

Substitution reaction

which one of the following is not a nucleophile?

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H₂O

H₂S

BF₃

NH₃

Primary carbon attaches with other hydrogen atoms directly:

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One

Two

Three

At least one or more than it

With the increase in size of halogen atom the reactivity of an alkyl halide

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Increases

Decreases

Remain constant

None of these

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2-bromo-3-methylbutane

3-methyl-2-bromobutane

2-methyl-3-bromobutane

All of these

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