More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
ECAT Chemistry Chapter 21 Alkyl Halides Online Test MCQs With Answers
Question # 1
Which is a weak nucleophile
Choose an answer
OH
-
Br
-
NH
3
CI
-
Previous
Skip
Next
Question # 2
Choose an answer
2-bromo-3-methylbutane
3-methyl-2-bromobutane
2-methyl-3-bromobutane
All of these
Previous
Skip
Next
Question # 3
which one of the following is not a nucleophile?
Choose an answer
H
2
O
H
2
S
BF
3
NH
3
Previous
Skip
Next
Question # 4
Ethyl bromide on treatment with alcoholic KOH gives
Choose an answer
Ethylene
Ethanol
Acetic Acid
Ethane
Previous
Skip
Next
Question # 5
Benzene reacts with chlorine to form benzene hexachloride in presence of
Choose an answer
Nickel
AlCl
3
Bright sunlight
Zinc
Previous
Skip
Next
Question # 6
Which of the following is a nucleophile
Choose an answer
OH
CH(CH
3
)
3
CH
3
+
CH
3
CH
2
CH
3
Previous
Skip
Next
Question # 7
When formaldehyde is added to Grignard reagent we get
Choose an answer
Aldehyde
Acetone
Primary alcohol
Secondary alcohol
Previous
Skip
Next
Question # 8
A set of compounds in which reactivity of halogen atom in the ascending order is
Choose an answer
Chlorobenzene, vinyl chloride, chloroethane
Chloroethane, chlorobenzene, vinyl chloride
Vinyl chloride,chlorobenzene chloroethane
Vinyl chloride, chloroethane,chlorobenzene
Previous
Skip
Next
Question # 9
Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with
Choose an answer
Any aromatic amine
Any primary amine
Any amine
Any aliphatic amine
Previous
Skip
Next
Question # 10
Grignard's reagent on treatment with carbonyl compounds yield
Choose an answer
Pheonol
Alcohol
Alkane
None of these
Previous
Skip
Next
Question # 11
Hydrolysis of Grignard's reagent gives:
Choose an answer
Alkane
Alkyl
Halide
Alcohol
Previous
Skip
Next
Question # 12
Butanenitrile is formed by reaction of KCN with
Choose an answer
Propyl alcohol
Butyl chloride
Butyl alcohol
Propyl Chloride
Previous
Skip
Next
Question # 13
Steps in SN , reactions are:
Choose an answer
One
Two
Three
Four
Previous
Skip
Next
Question # 14
Choose an answer
Electronphilic substitution
Electrophilic addition
Free radical substitution
Nuclephilic substitution
Previous
Skip
Next
Question # 15
Which bond is most stable
Choose an answer
C - Cl
C - F
C - Br
C - I
Previous
Skip
Next
Question # 16
CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF
2
Cl.
Choose an answer
CHF Cl C FCl
CH Cl CF
2
Cl
CHF CF
2
Cl
C FCl CF
2
Cl
Previous
Skip
Next
Question # 17
The compounds or species in search of electrons are called
Choose an answer
Elctrophiles
Nucleophile
Nitrities
Bases
Previous
Skip
Next
Question # 18
Gammexane is
Choose an answer
Chlorobenzene
Benzyl chloride
Brommobenzene
Benzene hexachloride
Previous
Skip
Next
Question # 19
In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?
Choose an answer
Two
Three
One
Four
Previous
Skip
Next
Question # 20
What is the total number of different chloroethanes, formula C
2
H
6-n
Cl
n
, where n can be any integer from 1 to 4
Choose an answer
4
6
7
8
Previous
Skip
Next
Question # 21
Any other aldehyde except formaldehyde on reaction with Grignard's will produce
Choose an answer
Secondary alcohol
Primary alcohol
Tertiary alcohol
Aromatic alcohol
Previous
Skip
Next
Question # 22
Halogens on treating with silver salts of acids give
Choose an answer
Alcohol
Ester
Phenol
Alkyl halide
Previous
Skip
Next
Question # 23
Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to
Choose an answer
The formation of less stable carbonium ion
Resonance stabilization
Larger carbon-halogen bond
The inductive effect
Previous
Skip
Next
Question # 24
Grignard's reagent is
Choose an answer
Alkyl halide
Magnesium halide
Alkyl magnesium halide
Ethereal solution of an alkyl halide
Previous
Skip
Next
Question # 25
DDT is formed from
Choose an answer
Benzene and Chlorobenzene
Chloral and Chlorobenzene
Chloral and Benzene
Chlorobenzene and chlorine
Previous
Skip
Next
Question # 26
The rate of E
1
reaction depends upon
Choose an answer
The concentration of substrate
The concentration of nucleophile
THe concentration of substrate as well as nucleophile
None of the above
Previous
Skip
Next
Question # 27
Which one of the following is not a nuclelphile
Choose an answer
H
2
O
H
2
S
BF
3
NH
3
Previous
Skip
Next
Question # 28
Allyl chloride on dehydrochlorination gives
Choose an answer
Propadiene
Propylene
Allyl alcohol
Acetone
Previous
Skip
Next
Question # 29
The order of reactivity for a given halogen in Grignard's reagent is:
Choose an answer
CH
3
X > C
2
H
5
X > C
3
H
4
X > C
4
H
4
X
C
2
H
5
X > C
3
H
7
X > C
4
H
5
X > CH
4
X
C
3
H
7
X > C
4
H
7
X > CH
3
X > C
2
H
5
X
C
4
H
4
X > C
3
H
7
X > C
2
H
5
X > CH
4
X
Previous
Skip
Next
Question # 30
SN
2
reactions can be best carried out with:
Choose an answer
Prl. alkyl halide
Sec. Alkyl halide
Ter. Alkyl halide
All of three
Previous
Skip
Next
Question # 31
The most reactive compound for electrophilic nitration will be
Choose an answer
Benzyl chloride
Benzoic acid
Nitrobenzene
Chlorobenzene
Previous
Skip
Next
Back