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

Which one of the following is not a nuclelphile

Question # 2

Grignard reagent is not prepared in aqueous medium but prepared in ether medium because

Question # 3

In which of the following reactions is the inorganic reagent acting as a nucleophile

Question # 4

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

Question # 5

A set of compounds in which reactivity of halogen atom in the ascending order is

Question # 6

Which of the following compounds could be prepared by reacting bromoethane with KCN and then reducing the product

Question # 7

Dehydrohalogenation of alkyl halides produces

Question # 8

The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

Question # 9

Which is a weak nucleophile

Question # 10

Alkyl halides on treatment with aqueous KOH give

Question # 11

With the increase in size of halogen atom the reactivity of an alkyl halide

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Dehydrohalogenation of alkyl halides give

Question # 16

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

Question # 17

Iodoethane reacts with sodium in ether, the product formed is

Question # 18

By simply reacting Grignand's reagent with water we get

Question # 19

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

Question # 20

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

Question # 21

Alkyl halides on treatment with Zn and HCI gives

Question # 22

Ethyl chloride on treatment with aqueous alkali gives

Question # 23

C- X bond is strong in

Question # 24

Hydrolysis of Grignard's reagent yields

Question # 25

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

Question # 26

SN1 reaction of alkylhalides leads to

Question # 27

When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is

Question # 28

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

Question # 29

Benzene hexachloride is used as

Question # 30

Alcohol can be prepared from Grignard's reagent with an aldehyde: If we start with formaldehyde the product alcohol with be

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Grignard's reagent on treatment with chloramine give
A. Acetamide
B. Primary amice
C. Secondary amice
D. Urea
2 C- X bond is strong in
A. CH3Cl
B. CH3Br
C. CH3F
D. CH3I
3 The reactivity order of alkyl halides for a paricular alkyl group is
A. Fluoride > chloride > bromide > iodide
B. Chloride > bromide > fluoride > iodide
C. Iodide > bromide > chloride > fluoride
D. Bromide > iodide > chloride > fluoride
4 Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called
A. Primary alkyl halides
B. Secondary alkyl halides
C. Tertiary alkyl halides
D. Quaternary alkyl halides
5 Carbon atom holding halogen in aryl halides is
A. sp2-hybridesed
B. sp3-hybridesed
C. sp-hybridesed
D. sp3d-hybridesed
6 The elimination of hydrogen halide from adjacent carbon atoms is called
A. Dehydrogenation
B. Hydrogenation
C. Dehydrohalogenation
D. Hydrohalogenation
7 To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H2SO4
A. Trichloroethane
B. Dichloroacetone
C. Dichloroacetaldehyde
D. Trichloroacetealdehyde
8 Catalyst in the reaction ROH + SOCl2-------> RCL+SO2+HCl is:
A. ZnCl2
B. Pyridine
C. H2SO4
D. Either
9 The reaction of alcohol with SOCI2in the presence of pyridine as catalyst gives
A. Acids
B. Acid chloride
C. Alkyl halide
D. Benzene
10 Which reaction is example of nucleophilic substitution

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