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

Which of the following compounds could be prepared by reacting bromoethane with KCN and then reducing the product

Question # 2

Ethyl bromide is formed by the reaction of HBr with

Question # 3

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

Question # 4

Thre rate of SN2 reaction depends upon the

Question # 5

Alkyle magnesium halides are known as

Question # 6

Alkyl halides on treatment with aqueous KOH give

Question # 7

1-Chlorobutane on reaction with alcoholic potash gives

Question # 8

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

Question # 9

Which halide among the following is used as methylating agent?

Question # 10

E2has molecularity :

Question # 11

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

Question # 12

Alkyl halides on treatment with metallic Na give

Question # 13

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

Question # 14

When alkyl halides are heated with aqueous solution of ammonia at about 100°C, amines are formed. This reaction is known as

Question # 15

Cl2reacts with CS2in presence of AlCl3to form

Question # 16

Which responds to +ve iodoform test?

Question # 17

Which one of the following will have the maximum dipole moment

Question # 18

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

Question # 19

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:

Question # 20

Elimination bimolecular reactions involve:

Question # 21

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

Question # 22

The chloroform reacts with NaOH to give

Question # 23

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

Question # 24

1, 3-Dibromopropane reacts with metallic zinc to form

Question # 25

Dehydrohalogenation of alkyl halides produces

Question # 26

What is the total number of different chloroethanes, formula C2H6-nCln, where n can be any integer from 1 to 4

Question # 27

For the carbylamine reaction we need hot alc.KOH and

Question # 28

Grignard's reagent on treatment with carbonyl compounds yield

Question # 29

Alkanes may be prepared by the reaction of alkyl halides with

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 The reactivity order of alkyl halides for a particular alkyl group is:
A. F >Cl>Br>I
B. Cl>Br>F>l
C. l>Br>Cl>F
D. Br>l>Cl>F
2 By simply reacting Grignand's reagent with water we get
A. An alkane
B. Higher alkane
C. An alkene
D. An alkyne
3
Question Image
A. 2-bromo-3-methylbutane
B. 3-methyl-2-bromobutane
C. 2-methyl-3-bromobutane
D. All of these
4 When metallic sodium in ether is heated with ethyl chloride, which alkane is formed
A. Propane
B. Ethane
C. Iso-butane
D. N-butane
5
Question Image
A. Primary alkyl halide
B. Secondary alkyl halide
C. Tertiary alkyl halide
D. None of these
6 Grignard's reagent is
A. Alkyl halide
B. Magnesium halide
C. Alkyl magnesium halide
D. Ethereal solution of an alkyl halide
7 The reaction of alcohol with SOCI2in the presence of pyridine as catalyst gives
A. Acids
B. Acid chloride
C. Alkyl halide
D. Benzene
8 Tetrabromoethane on treatment with alcoholic zinc gives
A. Ethylbromide
B. Ethane
C. Ethene
D. Ethyne
9 Elimination bimolecular reactions involve:
A. First order Kinetics
B. Third order kinetics
C. Zero order kinetics
10 E1mechanism is generally shown by
A. 1° - RX
B. 2° - RX
C. 3° - RX
D. None of these

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