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

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

Question # 2

Gammexane is

Question # 3

Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated

Question # 4

Hydrolysis of Grignard's reagent yields

Question # 5

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

Question # 6

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

Question # 7

C6H6Cl6can be obtained from

Question # 8

Grignard's reagent is

Question # 9

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

Question # 10

SN1 reaction of alkylhalides leads to

Question # 11

Alkyle magnesium halides are known as

Question # 12

Which represents nucleophilic aromatic substitution reaction?

Question # 13

The alkyl halide is converted into an alcohol by

Question # 14

By reaction Grignard's reagent with the HCHO we get

Question # 15

General formula of alkyl halide is:

Question # 16

Electronegativity order of alkyl halides is:

Question # 17

When CO2is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

Question # 18

How many monochlorobutanes will be possible on chlorination of n-butane?

Question # 19

When formaldehyde is added to Grignard reagent we get

Question # 20

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

Question # 21

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 # 22

Most reactive halide towards SN1 reaction is

Question # 23

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

Question # 24

SN2 reaction can be best carried out with

Question # 25

The alkyl halide molecule on which a nucleophile attacks is called

Question # 26

E1mechanism is generally shown by

Question # 27

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

Question # 28

Reaction of Griganard's reagent with CO2gives:

Question # 29

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

Question # 30

Alkyl halides react with lithium dialkyl copper reagents to give

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Catalyst in the reaction ROH + SOCl2-------> RCL+SO2+HCl is:
A. ZnCl2
B. Pyridine
C. H2SO4
D. Either
2 The alkyl halide is converted into an alcohol by
A. Addition
B. Substitution
C. Dehydrohalogenation
D. Elimination
3 Which of the following reacts with chloroform and base to form phenyl isocynaide?
A. Nitrobenzene
B. Phenol
C. Chlorobenzene
D. Aniline
4 Metal used in the preparation of Grignard's reagent is:
A. Ca
B. Na
C. Mg
D. Zn
5 Alkyle magnesium halides are known as
A. Simon-smith reagent
B. Tollen's reagent
C. Grignard's reagent
D. Barford's reagent
6 The order of reactivity for a given halogen in Grignard's reagent is:
A. CH3X > C2H5X > C3H4X > C4H4X
B. C2H5X > C3H7X > C4H5X > CH4X
C. C3H7X > C4H7X > CH3X > C2H5X
D. C4H4X > C3H7X > C2H5X > CH4X
7 1, 3-Dibromopropane reacts with metallic zinc to form
A. Propene
B. Propane
C. Cyclopropane
D. Hexane
8
Question Image
A. 2-bromo-3-methylbutane
B. 3-methyl-2-bromobutane
C. 2-methyl-3-bromobutane
D. All of these
9 By simply reacting Grignand's reagent with water we get
A. An alkane
B. Higher alkane
C. An alkene
D. An alkyne
10 Ethyl bromide is formed by the reaction of HBr with
A. Ethane
B. Ethene
C. Ethyne
D. Propane

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