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

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 # 2

If Grignard reagent is allowed to react with another alkyl halide the main product is

Question # 3

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

Question # 4

Hydrolysis of Grignard's reagent gives:

Question # 5

Steps in SN , reactions are:

Question # 6

Elimination bimolecular reactions usually obey

Question # 7

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

Question # 8

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

Question # 9

When chloroform is boiled with NaOH, it gives

Question # 10

E2has molecularity :

Question # 11

Primary carbon attaches with other hydrogen atoms directly:

Question # 12

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

Question # 13

Alkyl halides react with Mg in dry ether to form

Question # 14

When formaldehyde is added to Grignard reagent we get

Question # 15

Allyl chloride on dehydrochlorination gives

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Which one of the following will have the maximum dipole moment

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

Question # 26

The chloroform reacts with NaOH to give

Question # 27

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

Question # 28

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

Question # 29

Cl2reacts with CS2in presence of AlCl3to form

Question # 30

Grignard's reagent is

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 When CO2 is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is:
A. Propane
B. Propanoic acid
C. Propanal
D. Propanol
2 Reactivity of alkyl halides with magnisium is of the order:
A. Rl > RBr> RCl > RF
B. RBr > RCl >RF > Rl
C. RCL > RF > Rl > RBr
D. RF >RI >RBr > RII
3 Tetrabromoethane on treatment with alcoholic zinc gives
A. Ethylbromide
B. Ethane
C. Ethene
D. Ethyne
4 Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?
A. HCl + anhyd. Zncl2
B. NaCl
C. PCl5
D. SOCl2
5 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
6 Elimination bimolecular reactions involve:
A. First order Kinetics
B. Third order kinetics
C. Zero order kinetics
7 Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to
A. The formation of less stable carbonium ion
B. Resonance stabilization
C. Larger carbon-halogen bond
D. The inductive effect
8 Chlorobenzene on heating with aqueous NH3under pressure in the presence of cuprous chloride gives
A. Benzamide
B. Nitrobenzene
C. Aniline
D. Chloroaminobenzene
9 Cl2reacts with CS2in presence of AlCl3to form
A. CHCl3
B. CCl4
C. C2H5Cl
D. C2H6
10 The order of reactivity for a given halogen in Grignard's reagent is:
A. CH3X > C2H5X > C3H4X > C4H4X
B. C2H5X > C3H7X > C4H5X > CH4X
C. C3H7X > C4H7X > CH3X > C2H5X
D. C4H4X > C3H7X > C2H5X > CH4X

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