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

To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H2SO4

Question # 2

Alkanes may be prepared by the reaction of alkyl halides with

Question # 3

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

Question # 4

The general formula of alkyl halides is

Question # 5

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

Question # 6

C6H6Cl6can be obtained from

Question # 7

Electronegativity order of alkyl halides is:

Question # 8

Grignad reagent is reactive due to

Question # 9

Alkyle halides can be prepared by treating halogen acids with

Question # 10

1-Chlorobutane on reaction with alcoholic potash gives

Question # 11

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

Question # 12

Tetrabromoethane on treatment with alcoholic zinc gives

Question # 13

Most reactive halide towards SN1 reaction is

Question # 14

Gammexane is

Question # 15

Cl2reacts with CS2in presence of AlCl3to form

Question # 16

Halogens on treating with silver salts of acids give

Question # 17

The rate of E1reaction depends upon:

Question # 18

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

Question # 19

For the carbylamine reaction we need hot alc.KOH and

Question # 20

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

Question # 21

Which represents nucleophilic aromatic substitution reaction?

Question # 22

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

Question # 23

Benzene hexachloride is used as

Question # 24

Grignard's reagent is

Question # 25

Reaction of Griganard's reagent with CO2gives:

Question # 26

The elimination of hydrogen halide from adjacent carbon atoms is called

Question # 27

E1mechanism is generally shown by

Question # 28

Carbon atom holding halogen in aryl halides is

Question # 29

Grignard reagent is reactive due to :

Question # 30

Which reaction is example of nucleophilic substitution

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Both E1and E2mechanism can be shown by
A. 1° - RX
B. 2° - RX
C. 3° - RX
D. None of these
2 On warming with silver powder,chloroform is converted into
A. Acetylene
B. Hexachloroethane
C. 1,1,2,2-tetrachloroethane
D. ethylene
3 1, 3-Dibromopropane reacts with metallic zinc to form
A. Propene
B. Propane
C. Cyclopropane
D. Hexane
4 Hydrolysis of Grignard's reagent yields
A. Alcohol
B. Aldyhyde
C. Ester
D. Alkane
5 The general formula of alkyl halides is
A. CnH2nX
B. CnH2n-1X
C. CnH2n+1X
D. CnH2n-2X
6 The elimination of hydrogen halide from adjacent carbon atoms is called
A. Dehydrogenation
B. Hydrogenation
C. Dehydrohalogenation
D. Hydrohalogenation
7 Alkyl halides on treatment with Zn and HCI gives
A. Alkanes
B. Alkenes
C. Alkynes
D. Alcohols
8 Which reaction is example of nucleophilic substitution
9 1-Chlorobutane on reaction with alcoholic potash gives
A. But 1-ene
B. Butan-1-ol
C. But-2-ene
D. Butan-2-ol
10 Which of the following undergoes uncleophilic substitution exclusively by SN1 mechanism?
A. Benzyl chloride
B. Ethyl chloride
C. Chlorobenzene
D. Isopropyl choride

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