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

Cl2reacts with CS2in presence of AlCl3to form

Question # 2

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

Question # 3

Alkyle halides can be prepared by treating halogen acids with

Question # 4

Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of

Question # 5

Which of the following does not give iodoform test?

Question # 6

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

Question # 7

If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a

Question # 8

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

Question # 9

The rate of E1reaction depends upon

Question # 10

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

Question # 11

Reation of which with Grignard's reagent gives primary alcohol:

Question # 12

Which of the following compounds gives trichoromethane on distilling with bleaching power?

Question # 13

By reaction Grignard's reagent with the HCHO we get

Question # 14

Which of the following undergoes uncleophilic substitution exclusively by SN1 mechanism?

Question # 15

Dehydrohalogenation of alkyl halides give

Question # 16

Iodoethane reacts with sodium in ether, the product formed is

Question # 17

Reactivity of alkyl halides with magnisium is of the order:

Question # 18

Which one of the following is not a nuclelphile

Question # 19

The reaction of an alkyl halide with RCOOAg produces

Question # 20

Which is a good nucleophile?

Question # 21

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

Question # 22

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

Question # 23

Which halide among the following is used as methylating agent?

Question # 24

Ethyl chloride on treatment with aqueous alkali gives

Question # 25

The rate of E1reaction depends upon:

Question # 26

Which one of the following will have the maximum dipole moment

Question # 27

Steps in SN , reactions are:

Question # 28

Which is a weak nucleophile

Question # 29

Which of the followings is not a nulceophile

Question # 30

When chloroform is boiled with NaOH, it gives

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The reaction of alcohol with SOCI2in the presence of pyridine as catalyst gives
A. Acids
B. Acid chloride
C. Alkyl halide
D. Benzene
4
Question Image
A. Electronphilic substitution
B. Electrophilic addition
C. Free radical substitution
D. Nuclephilic substitution
5 Ethyl bromide is formed by the reaction of HBr with
A. Ethane
B. Ethene
C. Ethyne
D. Propane
6 E1mechanism is generally shown by
A. 1° - RX
B. 2° - RX
C. 3° - RX
D. None of these
7 Which responds to +ve iodoform test?
A. Butanol-1
B. Butan-1-al
C. Butanol-2
D. 2-pentanone
8 When alkyl halides are heated with aqueous solution of ammonia at about 100°C, amines are formed. This reaction is known as
A. Williamsons synthesis
B. GHoffmans reaction
C. Wurtz reaction
D. Clemensen reaction
9 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
10 Ethyl alcohol gives ethyl chloride with the help of
A. SOCl2
B. NaCl
C. Cl2
D. KCl

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