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

Grignard's reagent on treatment with dry CO2and HCI yields

Question # 2

Ammonia like water also reacts with Grignard's reagent to give

Question # 3

Alkyle halides can be prepared by treating halogen acids with

Question # 4

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

Question # 5

Benzene reacts with chlorine to form benzene hexachloride in presence of

Question # 6

When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is

Question # 7

Which of the following does not give iodoform test?

Question # 8

SN2reactions can be best carried out with:

Question # 9

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

Question # 10

Alkyl halides on treatment with aqueous KOH give

Question # 11

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

Question # 12

Metal used in the preparation of Grignard's reagent is:

Question # 13

Grignard reagent is prepared by the reaction of magnesium metal with alkyl halide in the presence of

Question # 14

Which reaction is example of nucleophilic substitution

Question # 15

Grignard reagent is reactive due to :

Question # 16

E1mechanism is generally shown by

Question # 17

Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called

Question # 18

The alkyl halide molecule on which a nucleophile attacks is called

Question # 19

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

Question # 20

Reaction of Griganard's reagent with CO2gives:

Question # 21

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

Question # 22

Which one of the following is not a nucleophile

Question # 23

A set of compounds in which reactivity of halogen atom in the ascending order is

Question # 24

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 # 25

Elimination bimolecular reactions involve:

Question # 26

Grignard's reagent was prepared in:

Question # 27

The alkyl halide is converted into an alcohol by

Question # 28

An electrophile may be

Question # 29

Halogens on treating with silver salts of acids give

Question # 30

Alkyle magnesium halides are known as

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1
Question Image
A. Condensation
B. Electrophilic substitution
C. Free radical substitution
D. Nucleophilic substitution
2 If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a
A. primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. Aromatic alcohol
3 Which represents nucleophilic aromatic substitution reaction?
A. Reaction of benzene with Cl2in sunlight
B. Benzyl bromide hydrolysis with water
C. Reaction of NaOH with dintrofluoro benzene
D. Sulphonation of benzene
4 Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:
A. They have an electrophilic carbon
B. They have an electrophilic carbon and good living gorup
C. They have an electrophilic carbon and bad living group
D. They have an nucleophilic carbon and good living gorup
5 Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with
A. Any aromatic amine
B. Any primary amine
C. Any amine
D. Any aliphatic amine
6 Grignard's reagent was prepared in:
A. 1900
B. 1910
C. 1920
D. 1930
7 Hydrolysis of Grignard's reagent yields
A. Alcohol
B. Aldyhyde
C. Ester
D. Alkane
8 Which reaction is example of nucleophilic substitution
9 Best medhod of preparation of alkyl halide from alcohals is by its reaction with:
A. HX
B. SOCl2
C. Px5 and PX3
D. All
10 Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent
A. A ketone
B. An aldehyde
C. An ether
D. Water

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