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

Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with

Question # 2

Elimination bimolecular reactions involve:

Question # 3

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

Question # 4

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

Question # 5

SN1 reaction of alkylhalides leads to

Question # 6

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

Question # 7

Grignard's reagent is

Question # 8

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

Question # 9

Cyanoform is ________ acid in nature than the chloroform. The missing word is

Question # 10

Which of the following is a nucleophile

Question # 11

For which mechanisms, the first step involved is the same:

Question # 12

Which represents nucleophilic aromatic substitution reaction?

Question # 13

Steps in SN , reactions are:

Question # 14

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

Question # 15

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

Question # 16

Iodoethane reacts with sodium in ether, the product formed is

Question # 17

Which is a good nucleophile?

Question # 18

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

Question # 19

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

Question # 20

Reaction of Griganard's reagent with CO2gives:

Question # 21

Catalyst in the reaction ROH + SOCl2-------> RCL+SO2+HCl is:

Question # 22

Which of the following compounds on oxidation gives benzoic acid?

Question # 23

Alkyl halides on treatment with Zn and HCI gives

Question # 24

Carbon atom holding halogen in aryl halides is

Question # 25

The order of reactivity for a given halogen in Grignard's reagent is:

Question # 26

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

Question # 27

Reactivity of alkyl halides with magnisium is of the order:

Question # 28

Grignard reagent is reactive due to :

Question # 29

Both E1and E2mechanism can be shown by

Question # 30

The reactivity order of alkyl halides for a particular alkyl group is:

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Allyl chloride on dehydrochlorination gives
A. Propadiene
B. Propylene
C. Allyl alcohol
D. Acetone
2 When primary amine reacts with chloroform in ethanolic KOH, then the product is
A. An isocyanide
B. An aldehyde
C. A cyanide
D. An alcohol
3 General formula of alkyl halide is:
A. R----X
B. R----OH
C. R------COH
D. R------COOH
4 Dehydrohalogenation of alkyl halides produces
A. Alcohol
B. Alkane
C. Alkene
D. Alkyne
5 The reaction of an alkyl halide with RCOOAg produces
A. Ester
B. Ether
C. Aldehyde
D. Ketone
6 C- X bond is strong in
A. CH3Cl
B. CH3Br
C. CH3F
D. CH3I
7 When carbon dioxide is passed through the R - Mg - X is produced
A. Any carboxylic acid
B. Propanoic acid
C. Propanedioic acid
D. None of these
8 1-Chlorobutane on reaction with alcoholic potash gives
A. But 1-ene
B. Butan-1-ol
C. But-2-ene
D. Butan-2-ol
9 The elimination of hydrogen halide from adjacent carbon atoms is called
A. Dehydrogenation
B. Hydrogenation
C. Dehydrohalogenation
D. Hydrohalogenation
10 The most reactive compound for electrophilic nitration will be
A. Benzyl chloride
B. Benzoic acid
C. Nitrobenzene
D. Chlorobenzene

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