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

For the carbylamine reaction we need hot alc.KOH and

Question # 2

Alkyl halides on treatment with Zn and HCI gives

Question # 3

Which represents nucleophilic aromatic substitution reaction?

Question # 4

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

Question # 5

Alkanes may be prepared by the reaction of alkyl halides with

Question # 6

Grignard reagent is prepared by the reaction of magnesium metal with alkyl halide in the presence of

Question # 7

Primary carbon attaches with other hydrogen atoms directly:

Question # 8

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

Question # 9

Gammexane is

Question # 10

If Grignard reagent is allowed to react with another alkyl halide the main product is

Question # 11

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

Question # 12

Which of the following reacts with chloroform and base to form phenyl isocynaide?

Question # 13

Reactivity of alkyl halides with magnisium is of the order:

Question # 14

Benzene reacts with chlorine to form benzene hexachloride in presence of

Question # 15

Reaction of Griganard's reagent with CO2gives:

Question # 16

The rate of E1reaction depends upon

Question # 17

If carbon dioxide is bubbled through solution of Grignard's reagent in ether and the resultant product is reacted with hydrochloric acid, it gives

Question # 18

Which of the following does not give iodoform test?

Question # 19

Hydrolysis of Grignard's reagent yields

Question # 20

Elimination bimolecular reactions involve:

Question # 21

The reaction of alcohol with SOCI2in the presence of pyridine as catalyst gives

Question # 22

Ethyl chloride on treatment with aqueous alkali gives

Question # 23

Which is a good nucleophile?

Question # 24

If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a

Question # 25

Best medhod of preparation of alkyl halide from alcohals is by its reaction with:

Question # 26

The final product formed by distilling ethyl alcohol with excess of Cl2 and Ca(OH)2is

Question # 27

General formula of alkyl halide is:

Question # 28

When an alcohol reacts with SOCI2an alkyl halide is formed. What are two other products

Question # 29

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

Question # 30

Which is a weak nucleophile

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 With the increase in size of halogen atom the reactivity of an alkyl halide
A. Increases
B. Decreases
C. Remain constant
D. None of these
2 If Grignard reagent is allowed to react with another alkyl halide the main product is
A. An alkane
B. Cyclo alkane
C. Alkyne
D. An alkene
3 The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to
A. 4-Bromobenzyl cyanide
B. 4-Cyanobenzyl chloride
C. 4-Cyanobenzyle cyanide
D. 4-Bromo 2-cyanobenzyl chloride
4 Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as
A. Wurtz reaction
B. Frankland's reaction
C. Cannizaro reaction
D. Kalobe's reaction
5 Both E1and E2mechanism can be shown by
A. 1° - RX
B. 2° - RX
C. 3° - RX
D. None of these
6 DDT is formed from
A. Benzene and Chlorobenzene
B. Chloral and Chlorobenzene
C. Chloral and Benzene
D. Chlorobenzene and chlorine
7 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
8 The reaction of an alkyl halide with RCOOAg produces
A. Ester
B. Ether
C. Aldehyde
D. Ketone
9 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
10 When formaldehyde is added to Grignard reagent we get
A. Aldehyde
B. Acetone
C. Primary alcohol
D. Secondary alcohol

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