Question # 1

Which of the following compounds gives trichoromethane on distilling with bleaching power?

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Methanal

Phenol

Ethanol

methanol

If Grignard reagent is allowed to react with another alkyl halide the main product is

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An alkane

Cyclo alkane

Alkyne

An alkene

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

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1

2

3

5

1, 3-Dibromopropane reacts with metallic zinc to form

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Propene

Propane

Cyclopropane

Hexane

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

None of these

The alkyl halide molecule on which a nucleophile attacks is called

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Substrate

Subsituent

Substituted

All of these

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

SN2 reaction can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

Organic compounds containing halogen atom are called:

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R---OH

R----X

R----NH₂

R----COH

Which bond is most stable

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C - Cl

C - F

C - Br

C - I

Cl₂reacts with CS₂in presence of AlCl₃to form

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CHCl₃

CCl₄

C₂H₅Cl

C₂H₆

When alkyl halide is heated with aqueous solution of ammonia at 100°C the major product is

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Primary amine

Secondary amine

Tertiary amine

Mixture of amines and salt

Which one of the following will have the maximum dipole moment

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CH₃F

CH₃Cl

CH₃Br

CH₃l

Grignard reagent is prepared by the reaction of magnesium metal with alkyl halide in the presence of

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Alcohol

Water

Suephuric acid

Dry ether

which one of the following is not a nucleophile?

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H₂O

H₂S

BF₃

NH₃

By simply reacting Grignand's reagent with water we get

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An alkane

Higher alkane

An alkene

An alkyne

Hydrolysis of Grignard's reagent gives:

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Alkane

Alkyl

Halide

Alcohol

Reation of which with Grignard's reagent gives primary alcohol:

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Formaldehyde

Aldehyde

Ketones

Acetone

Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

Alkyl halides are reactive :

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High

Medium

Less

Least

Chlorobenzene on heating with aqueous NH₃under pressure in the presence of cuprous chloride gives

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Benzamide

Nitrobenzene

Aniline

Chloroaminobenzene

The order of reactivity for a given halogen in Grignard's reagent is:

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CH₃X > C₂H₅X > C₃H₄X > C₄H₄X

C₂H₅X > C₃H₇X > C₄H₅X > CH₄X

C₃H₇X > C₄H₇X > CH₃X > C₂H₅X

C₄H₄X > C₃H₇X > C₂H₅X > CH₄X

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Electrophilic addition

Electrophilic substitution

Free radical substitution

Nuclophilic addition

The final product formed by distilling ethyl alcohol with excess of Cl₂and Ca(OH)₂is

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CH₃CHO

CCl₃CHO

CHCl₃

(CH₃)₂O

The elimination of hydrogen halide from adjacent carbon atoms is called

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Dehydrogenation

Hydrogenation

Dehydrohalogenation

Hydrohalogenation

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

The reactivity order of alkyl halides for a particular alkyl group is:

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F >Cl>Br>I

Cl>Br>F>l

l>Br>Cl>F

Br>l>Cl>F

Grignard's reagent on treatment with dry CO₂and HCI yields

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Ester

Alcohol

Carboxylic acid

Aldehyde

Among the following the most reactive towards alcoholic KOH is

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CH₂= CHBr

CH₃COCH₂CH₂Br

CH₃CH₂Br

CH₃CH₂CH₂Br

Reactivity of alkyl halides with magnisium is of the order:

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Rl > RBr> RCl > RF

RBr > RCl >RF > Rl

RCL > RF > Rl > RBr

RF >RI >RBr > RII

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ECAT Chemistry Chapter 21 Alkyl Halides Online Test MCQs With Answers

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