ECAT Pre Engineering Chemistry Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 21 Alkyl Halides

Try The MCQ's Test For ECAT Chemistry Chapter 21 Alkyl Halides

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ECAT Chemistry Chapter 21 Alkyl Halides

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Question # 1

When carbon dioxide is passed through the R - Mg - X is produced

Question # 2

Ethyl bromide is formed by the reaction of HBr with

Question # 3

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

Question # 4

On warming with silver powder,chloroform is converted into

Question # 5

Which of the following alkyl halides is used as a mathylating agent

Question # 6

When CO2 is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is:

Question # 7

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

Question # 8

Gammexane is

Question # 9

Reactivity of alkyl halides with magnisium is of the order:

Question # 10

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

Question # 11

Benzene reacts with chlorine to form benzene hexachloride in presence of

Question # 12

An electrophile may be

Question # 13

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

Question # 14

E2has molecularity :

Question # 15

Which one of the following is not a nuclelphile

Question # 16

The alkyl halide is converted into an alcohol by

Question # 17

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:

Question # 18

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

Question # 19

Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called

Question # 20

Grignard's reagent is

Question # 21

Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of

Question # 22

The alkyl halide molecule on which a nucleophile attacks is called

Question # 23

Benzene hexachloride is used as

Question # 24

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

Question # 25

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

Question # 26

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

Question # 27

The rate of E1reaction depends upon:

Question # 28

Which of the following with aqueous KOH will give acetaldehyde?

Question # 29

What is the total number of different chloroethanes of formula C2H6-nClnpossible (n may be 1 to 6)

Question # 30

By simply reacting Grignand's reagent with water we get

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which of the following alkyl halides is used as a mathylating agent
A. CH2H5l
B. CH3l
C. C2H5Pr
D. C2H5Cl
2 SN2reactions can be best carried out with:
A. Prl. alkyl halide
B. Sec. Alkyl halide
C. Ter. Alkyl halide
D. All of three
3 Carbon atom holding halogen in aryl halides is
A. sp2-hybridesed
B. sp3-hybridesed
C. sp-hybridesed
D. sp3d-hybridesed
4 What is the total number of different chloroethanes, formula C2H6-nCln, where n can be any integer from 1 to 4
A. 4
B. 6
C. 7
D. 8
5 Alkyle halides can be prepared by treating halogen acids with
A. Ethane
B. Ethanol
C. Ethene and ethanol
D. Aldehyde
6
Question Image
A. Electrophilic substitution
B. Free radical reduction
C. Isomerisation
D. Nucleophilic substitution
7 Grignard's reagent on treatment with dry CO2and HCI yields
A. Ester
B. Alcohol
C. Carboxylic acid
D. Aldehyde
8 Benzene hexachloride is used as
A. Dye
B. Antimaterial drug
C. Antibiotic
D. Insecticide
9 Alkyl halides on treatment with metallic Na give
A. Alkynes
B. Alkenes
C. Alkanes
D. Alcohols
10 Ethyl alcohol gives ethyl chloride with the help of
A. SOCl2
B. NaCl
C. Cl2
D. KCl

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