Question # 1

General formula of alkyl halide is:

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R----X

R----OH

R------COH

R------COOH

2-Bromopentane is heated with potassium ethoxide in ethanol . The major product obtained is

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2-Ethoxypentane

Pent-1-ene

cis-Pent-2-ene

trans-Pent-2-ene

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

Which reaction is example of nucleophilic substitution

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Elimination bimolecular reactions usually obey

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First order kinetics

Second order kinetics

Third order kinetics

Zero order kinetics

E₂has molecularity :

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One

Two

Three

Half

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

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Reaction of Griganard's reagent with CO₂gives:

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Aldehyde

Pri-alcohol

Sec-alcohal

Carboxylic acid

Alkyl halides are reactive :

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High

Medium

Less

Least

Alkyl halides ae considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

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

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Propane

Ethane

Iso-butane

N-butane

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

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Two

Three

One

Four

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

None of these

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

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ECAT Chemistry Chapter 21 Alkyl Halides Online Test MCQs With Answers

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