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

Allyl chloride on dehydrochlorination gives

Question # 2

On warming with silver powder,chloroform is converted into

Question # 3

Ethyl alcohol gives ethyl chloride with the help of

Question # 4

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

Question # 5

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

Question # 6

Grignard reagent is reactive due to :

Question # 7

When carbon dioxide is passed through the R - Mg - X is produced

Question # 8

E1mechanism is generally shown by

Question # 9

Which one of the following will have the maximum dipole moment

Question # 10

Hydrolysis of Grignard's reagent gives:

Question # 11

1-Chlorobutane on reaction with alcoholic potash gives

Question # 12

Ethyl bromide on treatment with alcoholic KOH gives

Question # 13

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

Question # 14

1, 3-Dibromopropane reacts with metallic zinc to form

Question # 15

SN2reactions can be best carried out with:

Question # 16

Which one of the following in mainly responsible for depletion of ozone layer?

Question # 17

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

Question # 18

When primary amine reacts with chloroform in ethanolic KOH, then the product is

Question # 19

Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of

Question # 20

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

Question # 21

Ethyl chloride on treatment with aqueous alkali gives

Question # 22

An electrophile may be

Question # 23

Which of the following compounds gives trichoromethane on distilling with bleaching power?

Question # 24

The rate of E1reaction depends upon

Question # 25

The alkyl halide molecule on which a nucleophile attacks is called

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

In a primary alkyl halide, the halogen atom is attached to a carbon which is further attached to

Question # 30

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

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of
A. Onsolubility
B. Instability
C. Inductive effect
D. Steric hindrance
2
Question Image
A. Condensation
B. Electrophilic substitution
C. Free radical substitution
D. Nucleophilic substitution
3 Cyanoform is ________ acid in nature than the chloroform. The missing word is
A. Stronger
B. Weaker
C. Amphoteric
D. Neutral
4 Benzene reacts with chlorine to form benzene hexachloride in presence of
A. Nickel
B. AlCl3
C. Bright sunlight
D. Zinc
5 Which bond is most stable
A. C - Cl
B. C - F
C. C - Br
D. C - I
6 In which of the following reactions is the inorganic reagent acting as a nucleophile
7 Grignard's reagent was prepared in:
A. 1900
B. 1910
C. 1920
D. 1930
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 reaction of alcohol with SOCI2in the presence of pyridine as catalyst gives
A. Acids
B. Acid chloride
C. Alkyl halide
D. Benzene
10 Grignard reagent is not prepared in aqueous medium but prepared in ether medium because
A. The reagent is highly reactive in ether
B. The reagent does not react with water
C. The reagent becomes inactive in water
D. The reagent reacts with water

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