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

Among the following the most reactive towards alcoholic KOH is

Question # 2

Iodoethane reacts with sodium in ether, the product formed is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

E2has molecularity :

Question # 8

The reaction between primary amine-chloroform and alcoholic caustic potash is called

Question # 9

Elimination bimolecular reactions usually obey

Question # 10

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

Question # 11

Alkyl halides react with Mg in dry ether to form

Question # 12

Ethyl bromide on treatment with alcoholic KOH gives

Question # 13

Which is a weak nucleophile

Question # 14

DDT is formed from

Question # 15

Reduction of alkyl halides give

Question # 16

The elimination of hydrogen halide from adjacent carbon atoms is called

Question # 17

The chloroform reacts with NaOH to give

Question # 18

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

Question # 19

Alkyl halides on treatment with metallic Na give

Question # 20

Benzene hexachloride is used as

Question # 21

Which reaction is example of nucleophilic substitution

Question # 22

Which of the following with aqueous KOH will give acetaldehyde?

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Reaction of ethylamine with chloroform in alcoholic KOH produces

Question # 27

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

Question # 28

The compounds or species in search of electrons are called

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Reaction of ethylamine with chloroform in alcoholic KOH produces
A. CH3OH
B. CH3NC
C. C2H5NC
D. C2H5CN
2 Alkyl halides on treatment with Zn and HCI gives
A. Alkanes
B. Alkenes
C. Alkynes
D. Alcohols
3
Question Image
A. Primary alkyl halide
B. Secondary alkyl halide
C. Tertiary alkyl halide
D. None of these
4 Thre rate of SN2 reaction depends upon the
A. Concentration of alkyl halides
B. Concentration of nucleophile
C. Concentration of alkyl halides and nucleophile
D. None of the above
5 Alkyle halides can be prepared by treating halogen acids with
A. Ethane
B. Ethanol
C. Ethene and ethanol
D. Aldehyde
6 Best medhod of preparation of alkyl halide from alcohals is by its reaction with:
A. HX
B. SOCl2
C. Px5 and PX3
D. All
7 Which one of the following in mainly responsible for depletion of ozone layer?
A. Methane
B. Carbon dioxide
C. Water
D. chloroflurocarbons
8 In which of the following reactions is the inorganic reagent acting as a nucleophile
9 Carbon atom holding halogen in aryl halides is
A. sp2-hybridesed
B. sp3-hybridesed
C. sp-hybridesed
D. sp3d-hybridesed
10 When alkyl halide is heated with aqueous solution of ammonia at 100°C the major product is
A. Primary amine
B. Secondary amine
C. Tertiary amine
D. Mixture of amines and salt

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