Haloalkanes and Haloarenes Test

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Haloalkanes and Haloarenes Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

AgCN reacts with haloalkanes to form isocyanide. Haloalkanes react with KCN to form alkyl cyanides as main product

A
AgCN is mainly ionic in nature

B
KCN provides cyanide ions in solution.

C
KCN is mainly covalent in nature

D
AgCN provides cyanide ions in solution.

Solution

AgCN is covalent in nature while KCN is ionic so KCN produces CN- in the solution.

CN- is an ambient nucleophile i.e. it can form bond from both C and N atoms. KCN is an ionic compound so both C and N sides are available for the formation of bond, but C-C bond is stronger than C-N bond so cynide is formed. AgCN is a covalent compound so only N side is available for CN to form bond and thus isocynide is formed
Question 2
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Which of the following has the highest boiling point?

A
CH₃CH₂CH₂CH₂Br

B
CH₃CH₂CH(Br)CH₃

C
CH₃CH(CH₃)CH₂Br

D
All have the same boiling point.
Question 3
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Which of the following is correct?

A
Reduction of any aldehyde gives secondary alcohol.

B
Reaction of vegetable oil with H₂SO₄ gives glycerine.

C
Alcoholic iodine with NaOH gives iodoform.

D
Sucrose on reaction with NaCl gives invert sugar.
Question 4
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The reaction RX + 2Na + RX _______________? R – R + 2NaX is called.

A
Fittig reaction

B
Williamson’s synthesis

C
Wurtz reaction

D
Sandmeyer’reaction

Solution

This name reaction wurtz reaction.when 2 moles alkyl halide reacts with sodium then it is called wurtz reaction.
Question 5
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Which of the following compounds is an allyl bromide?

A
CH₂=CHCH₂Br

B
CH₃CH₂CH₂Br

C
CH₂=CHCH₂CH₂Br

D
CH₂=CHCH₂CH₂CH₂Br
Question 6
1 / -0

Which of the following compounds has the highest density?

A
C₅H₁₁CI

B
C₅H₁₁Br

C
C₅H₁₁I

D
C₅H₁₁F
Question 7
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Which of the following compounds has the highest boiling point?

A
RF

B
RCl

C
RBr

D
RI
Question 8
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1-phenyl-2-chloropropane, when treated with alcoholic KOH, gives ______ as the major product.

A
3-phenylpropene

B
2-phenylpropene

C
1-phenylpropene

D
4-phenylpropene

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Haloalkanes and Haloarenes Test - 1

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Haloalkanes and Haloarenes Test - 1

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Question 1

AgCN is mainly ionic in nature

KCN provides cyanide ions in solution.

KCN is mainly covalent in nature

AgCN provides cyanide ions in solution.

Solution

Question 2

CH3CH2CH2CH2Br

CH3CH2CH(Br)CH3

CH3CH(CH3)CH2Br

All have the same boiling point.

Question 3

Reduction of any aldehyde gives secondary alcohol.

Reaction of vegetable oil with H2SO4 gives glycerine.

Alcoholic iodine with NaOH gives iodoform.

Sucrose on reaction with NaCl gives invert sugar.

Question 4

Fittig reaction

Williamson’s synthesis

Wurtz reaction

Sandmeyer’reaction

Solution

Question 5

CH2=CHCH2Br

CH3CH2CH2Br

CH2=CHCH2CH2Br

CH2=CHCH2CH2CH2Br

Question 6

C5H11CI

C5H11Br

C5H11I

C5H11F

Question 7

RF

RCl

RBr

RI

Question 8

3-phenylpropene

2-phenylpropene

1-phenylpropene

4-phenylpropene

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CH₃CH₂CH₂CH₂Br

CH₃CH₂CH(Br)CH₃

CH₃CH(CH₃)CH₂Br

Reaction of vegetable oil with H₂SO₄ gives glycerine.

CH₂=CHCH₂Br

CH₃CH₂CH₂Br

CH₂=CHCH₂CH₂Br

CH₂=CHCH₂CH₂CH₂Br

C₅H₁₁CI

C₅H₁₁Br

C₅H₁₁I

C₅H₁₁F