Alkyl Halides & Aryl Halides Test

Result

Alkyl Halides & Aryl Halides Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which represents nucleophilic aromatic substitution reaction?

A
Reaction of benzene with Cl₂ in sunlight

B
Benzyl bromide hydrolysis with water

C
Reaction of NaOH with dinitrofluoro benzene

D
Sulphonation of benzene.

Solution

Two nitro groups make the nucleophilic substitution in benzene easy.
Question 2
1 / -0

An optically active 3-bromo-3-methyl hexane on hydrolysis gives

A
3-methyl-3-hexanol with retention of configuration

B
3-methyl-3-hexanol with inversion of configuration

C
a mixture of optically active 3-methyl-3-hexanol and 3-methyl-3-hexene

D
optically inactive 3-methyl-3-hexanol

Solution

3-bromo-3-methyl hexane, on ionization gives a 3° carbocation, which can be attacked by nucleophile (H₂O) to give 3-methyl-3-hexanol (optically active) as well as it can lose a proton to H₂O to give 3-methyl-3-hexene.
Question 3
1 / -0

Which of the following statements about benzyl chloride is incorrect?

A
it is less reactive than alkyl halides

B
it can be oxidized to benzanldehyde by boiling with copper nitrate solution

C
it is a lochymator liquid and answers Beilsteion,s test

D
it gives a white precipitate with alcoholic silver nitrate.

Solution

C₆H₅ – CH₂Cl (benzyl chloride) is as reactive as allyl halide as the halogen in both cases is bonded with sp3 carbon atom and both of them are more reactive than alkyl halide.
Question 4
1 / -0

Tertiary alkyl halides are practically inert to substitution by S_N² mechanism because of

A
insolubility

B
instability

C
inductive effect

D
steric hindrance

Solution

Steric hinderance due to bulky alkyl group prevents the backside attack of S_N².
Question 5
1 / -0

Alkyl halides react with lithium dialkyl copper reagents to give

A
insolubility

B
alkyl copper halides

C
alkanes

D
alkenyl haldes

Solution

R₂CuLi + CH₃CH₂ – Br → R – CH₂CH₂ + RCu + LiBr
Question 6
1 / -0

Which of the following undergoes nucleophilic substitution exclusively by S_N¹mechanism?

A
Benzyl chloride

B
Ethyl chloride

C
Chlorobenzene

D
Isopropyl chloride

Solution

Benzyl chloride forms resonance stabilized benzyl carbocation for S_N1 reaction.
Question 7
1 / -0

The halide, which undergoes nucleophilic substitution (by S_NAr mechanism) most readily is

A
p – MeC₆H₄Cl

B
p – MeOC₆H₄Cl

C
p – ClC₆H₄Cl

D
p – O₂NC₆H₄Cl

Solution

The reaction proceeds by carbanion formation, which can be stabilized by electron-withdrawing groups present at ortho or para positions. The most electron- withdrawing group amongst all is – NO₂.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Alkyl Halides & Aryl Halides Test - 1

Result

Alkyl Halides & Aryl Halides Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

Reaction of benzene with Cl2 in sunlight

Benzyl bromide hydrolysis with water

Reaction of NaOH with dinitrofluoro benzene

Sulphonation of benzene.

Solution

Question 2

3-methyl-3-hexanol with retention of configuration

3-methyl-3-hexanol with inversion of configuration

a mixture of optically active 3-methyl-3-hexanol and 3-methyl-3-hexene

optically inactive 3-methyl-3-hexanol

Solution

Question 3

it is less reactive than alkyl halides

it can be oxidized to benzanldehyde by boiling with copper nitrate solution

it is a lochymator liquid and answers Beilsteion,s test

it gives a white precipitate with alcoholic silver nitrate.

Solution

Question 4

insolubility

instability

inductive effect

steric hindrance

Solution

Question 5

insolubility

alkyl copper halides

alkanes

alkenyl haldes

Solution

Question 6

Benzyl chloride

Ethyl chloride

Chlorobenzene

Isopropyl chloride

Solution

Question 7

p – MeC6H4Cl

p – MeOC6H4Cl

p – ClC6H4Cl

p – O2NC6H4Cl

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

Reaction of benzene with Cl₂ in sunlight

p – MeC₆H₄Cl

p – MeOC₆H₄Cl

p – ClC₆H₄Cl

p – O₂NC₆H₄Cl