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

Benzene reacts with chlorine to form benzene hexachloride in presence of

Question # 2

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

Question # 3

Which represents nucleophilic aromatic substitution reaction?

Question # 4

Steps in SN , reactions are:

Question # 5

Cl2reacts with CS2in presence of AlCl3to form

Question # 6

The reaction of an alkyl halide with RCOOAg produces

Question # 7

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

Question # 8

Grignard's reagent was prepared in:

Question # 9

A reaction in which an atom or a group of atoms replaces an atom or a group of atoms in the molecule of a substance is known as

Question # 10

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

Question # 11

Reaction of Griganard's reagent with CO2gives:

Question # 12

Which of the following with aqueous KOH will give acetaldehyde?

Question # 13

1, 3-Dibromopropane reacts with metallic zinc to form

Question # 14

The reactivity order of alkyl halides for a paricular alkyl group is

Question # 15

The general formula of alkyl halides is

Question # 16

Which bond is most stable

Question # 17

Any other aldehyde except formaldehyde on reaction with Grignard's will produce

Question # 18

Elimination bimolecular reactions usually obey

Question # 19

Organic compounds containing halogen atom are called:

Question # 20

On warming with silver powder,chloroform is converted into

Question # 21

An electrophile may be

Question # 22

Iodoethane reacts with sodium in ether, the product formed is

Question # 23

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

Question # 24

E2has molecularity :

Question # 25

DDT is formed from

Question # 26

Grignard's reagent on treatment with carbonyl compounds yield

Question # 27

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

Question # 28

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 # 29

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

Question # 30

Alkyl halides on treatment with Zn and HCI gives

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Alkyle halides can be prepared by treating halogen acids with
A. Ethane
B. Ethanol
C. Ethene and ethanol
D. Aldehyde
2 The rate of E1reaction depends upon:
A. The concentration of substrate
B. The concentration of nucleophile
C. The concentration of substrate as well as nucleophile
D. None of these
3 Which of the following undergoes uncleophilic substitution exclusively by SN1 mechanism?
A. Benzyl chloride
B. Ethyl chloride
C. Chlorobenzene
D. Isopropyl choride
4
Question Image
A. NH3 HCl
B. KCN in C2H5OH NaOH
C. KCN in C2H5OH HCl
D. HCN NaOH
5 Catalyst in the reaction ROH + SOCl2-------> RCL+SO2+HCl is:
A. ZnCl2
B. Pyridine
C. H2SO4
D. Either
6 Alkyl halides on treatment with Zn and HCI gives
A. Alkanes
B. Alkenes
C. Alkynes
D. Alcohols
7 Which of the following compounds gives trichoromethane on distilling with bleaching power?
A. Methanal
B. Phenol
C. Ethanol
D. methanol
8 Butanenitrile is formed by reaction of KCN with
A. Propyl alcohol
B. Butyl chloride
C. Butyl alcohol
D. Propyl Chloride
9 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
10 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

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