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

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Chemistry Chapter 21 Alkyl Halides

00:00
Question # 1

To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H2SO4

Question # 2

Cl2reacts with CS2in presence of AlCl3to form

Question # 3

Which responds to +ve iodoform test?

Question # 4

Alkanes may be prepared by the reaction of alkyl halides with

Question # 5

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

Question # 6

Halogens on treating with silver salts of acids give

Question # 7

Which of the following is a nucleophile

Question # 8

Which is a weak nucleophile

Question # 9

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

Question # 10

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

Question # 11

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

Question # 12

Alkyl halides are reactive :

Question # 13

For the carbylamine reaction we need hot alc.KOH and

Question # 14

Cyanoform is ________ acid in nature than the chloroform. The missing word is

Question # 15

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

Question # 16

Each of the following compounds is effective as a refrigerant. The release of which one of these causes the greatest depletion of the ozone layer

Question # 17

Alkyl halides react with lithium dialkyl copper reagents to give

Question # 18

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

Question # 19

Grignard's reagent is

Question # 20

Reactivity of alkyl halides with magnisium is of the order:

Question # 21

Dehydrohalogenation of alkyl halides produces

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

Which bond is most stable

Question # 26

The alkyl halide is converted into an alcohol by

Question # 27

Both E1and E2mechanism can be shown by

Question # 28

Ethyl bromide on treatment with alcoholic KOH gives

Question # 29

E2has molecularity :

Question # 30

When primary amine reacts with chloroform in ethanolic KOH, then the product is

Submit

Prepare Complete Set Wise ECAT Chemistry Chapter 21 Alkyl Halides MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Chemistry Chapter 21 Alkyl Halides MCQ`s Test

  • M
    Mehreen Ather 19 - Dec - 2024 07 Min 45 Sec 85/120
  • G
    GOVT. SUFFA EDUCATION CENTER GIRLS MURIDKE 01 - Jun - 2024 08 Min 45 Sec 85/120
  • A
    Ayra Arshad 06 - Jul - 2024 04 Min 14 Sec 80/120
  • A
    Ali Asad Samejo 29 - Mar - 2024 05 Min 16 Sec 80/120
  • M
    Maryam Hamda 27 - May - 2024 14 Min 17 Sec 70/120
  • M
    Muhammad Ali 27 - Jun - 2024 04 Min 34 Sec 60/120
  • H
    Huzaifa Asim 30 - May - 2024 06 Min 34 Sec 60/120
  • N
    Nauman Iqbal 12 - Apr - 2024 13 Min 49 Sec 60/120
  • N
    Namers studio 13 - May - 2024 07 Min 23 Sec 55/120
  • R
    Rabbia Munir 10 - Mar - 2024 07 Min 28 Sec 55/120
  • T
    Tamshi Sohail 04 - May - 2024 08 Min 28 Sec 55/120
  • G
    Gulfam Ahmad 06 - May - 2024 09 Min 34 Sec 55/120
  • Z
    Zoya Zoya 27 - May - 2024 18 Min 52 Sec 55/120
  • R
    Rana waqar 02 - Jun - 2024 09 Min 52 Sec 50/120
  • A
    Abdullah Zubair 05 - Jan - 2025 11 Min 02 Sec 50/120

ECAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 If carbon dioxide is bubbled through solution of Grignard's reagent in ether and the resultant product is reacted with hydrochloric acid, it gives
A. An alkane
B. Al alcohol
C. A carboxylic acid
D. An aldehyde
2 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
A. Addition reaction
B. Condensation reaction
C. Elimination reaction
D. Substitution reaction
3 Alkyl halides react with lithium dialkyl copper reagents to give
A. Alkenes
B. Alkyl copper halides
C. Alkanes
D. Alkenyl halides
4 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 the above
5 DDT is formed from
A. Benzene and Chlorobenzene
B. Chloral and Chlorobenzene
C. Chloral and Benzene
D. Chlorobenzene and chlorine
6 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
7 An electrophile may be
A. Positive
B. Negative
C. Neutral
D. Both c and a
8 On warming with silver powder,chloroform is converted into
A. Acetylene
B. Hexachloroethane
C. 1,1,2,2-tetrachloroethane
D. ethylene
9 Which of the following with aqueous KOH will give acetaldehyde?
A. 1, 2-Dichloroethane
B. 1,1-Dichloroethane
C. Chloracetic acid
D. Ethyl chloride
10 Grignard reagent is prepared by the reaction of magnesium metal with alkyl halide in the presence of
A. Alcohol
B. Water
C. Suephuric acid
D. Dry ether

Test Questions

Is this page helpful?