Question # 1

General formula of alkyl halide is:

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R----X

R----OH

R------COH

R------COOH

Benzene reacts with chlorine to form benzene hexachloride in presence of

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Nickel

AlCl₃

Bright sunlight

Zinc

What is the total number of different chloroethanes, formula C₂H_6-nCl_n, where n can be any integer from 1 to 4

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4

6

7

8

Which reaction is example of nucleophilic substitution

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Benzene hexachloride is used as

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Dye

Antimaterial drug

Antibiotic

Insecticide

E₂has molecularity :

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One

Two

Three

Half

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

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

1, 3-Dibromopropane reacts with metallic zinc to form

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Propene

Propane

Cyclopropane

Hexane

Which of the following undergoes uncleophilic substitution exclusively by S_N1 mechanism?

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Benzyl chloride

Ethyl chloride

Chlorobenzene

Isopropyl choride

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

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

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HCl + anhyd. Zncl₂

NaCl

PCl₅

SOCl₂

Which halide among the following is used as methylating agent?

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CH₃l

C₂H₅Cl

C₂H₅Br

C₆H₅Cl

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

Grignard's reagent was prepared in:

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1900

1910

1920

1930

Steps in SN , reactions are:

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One

Two

Three

Four

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

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

Ethyl alcohol gives ethyl chloride with the help of

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SOCl₂

NaCl

Cl₂

KCl

Metal used in the preparation of Grignard's reagent is:

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Ca

Na

Mg

Zn

Dehydrohalogenation of alkyl halides produces

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Alcohol

Alkane

Alkene

Alkyne

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

Grignard's reagent on treatment with dry CO₂and HCI yields

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Ester

Alcohol

Carboxylic acid

Aldehyde

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

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

Any other aldehyde except formaldehyde on reaction with Grignard's will produce

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Secondary alcohol

Primary alcohol

Tertiary alcohol

Aromatic alcohol

Best medhod of preparation of alkyl halide from alcohals is by its reaction with:

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HX

SOCl₂

Px₅ and PX₃

All

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

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Caronium ion

Carbanion

Oconium ion

Carba ion

Which of the following with aqueous KOH will give acetaldehyde?

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1, 2-Dichloroethane

1,1-Dichloroethane

Chloracetic acid

Ethyl chloride

Which represents nucleophilic aromatic substitution reaction?

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Reaction of benzene with Cl₂in sunlight

Benzyl bromide hydrolysis with water

Reaction of NaOH with dintrofluoro benzene

Sulphonation of benzene

The compounds or species in search of electrons are called

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Elctrophiles

Nucleophile

Nitrities

Bases

More Classes

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ECAT Chemistry Chapter 21 Alkyl Halides Online Test MCQs With Answers

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