NEET Chemistry MCQ: NCERT Haloalkanes & SN2 Mechanism | NEET.Guide Questions

Which of the following reactions is most likely to proceed via a $S_N2$ mechanism?

A

Reaction of tert-butyl bromide with aqueous sodium hydroxide

B

Reaction of 2-bromopropane with sodium methoxide in methanol

C

Reaction of methyl iodide with sodium cyanide in DMF

D

Reaction of 2-chloro-2-methylpropane with ethanol

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :Alkyl Halides, SN2 Reaction, Solvents

Related Questions

Which of the following reactions is most likely to proceed via a $S_N2$ mechanism?

A

Reaction of tert-butyl bromide with aqueous sodium hydroxide

B

Reaction of 2-bromopropane with sodium methoxide in methanol

C

Reaction of methyl iodide with sodium cyanide in DMF

D

Reaction of 2-chloro-2-methylpropane with ethanol

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :Alkyl Halides, SN2 Reaction, Solvents

For a reaction proceeding through the S_N2 mechanism, using a polar protic solvent like water will:

A

Increase the reaction rate

B

Decrease the reaction rate

C

Have no effect on the reaction rate

D

Increase the reaction temperature

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

PYQ YEAR: 2016

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :SN2 reaction, solvents

The reaction $CH_3CH_2Br + NaCN o CH_3CH_2CN + NaBr$ is an example of an S_N2 reaction. Which solvent would be least effective in promoting this reaction?

A

Water

B

DMSO

C

Acetone

D

DMF

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

PYQ YEAR: 2016

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :SN2 reaction, solvents

Consider the reaction : $C{H_3}C{H_2}C{H_2}Br + NaCN o C{H_3}C{H_2}C{H_2}CN + NaBr$ . This reaction will be the fastest in :

A

water

B

ethanol

C

methanol

D

${\rm{N,}}\,{\rm{N'}}$ - dimethylformamide (DMF)

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :SN2 reaction, polar aprotic solvents, solvent effects

Which solvent would increase the rate of the S_N2 reaction: $CH_3CH_2CH_2Cl + KCN o CH_3CH_2CH_2CN + KCl$ ?

A

Water

B

Methanol

C

Ethanol

D

Acetone

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

PYQ YEAR: 2016

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :SN2 reaction, solvents

The reaction $CH_3CH_2CH_2Br + NaCN o CH_3CH_2CH_2CN + NaBr$ will be fastest in which solvent?

A

Water

B

Ethanol

C

Methanol

D

DMF

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

PYQ YEAR: 2016

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :SN2 reaction, solvents

In the S_N2 reaction $CH_3I + NaN_3 o CH_3N_3 + NaI$ , which solvent will favor the reaction?

A

Water

B

Methanol

C

Acetonitrile

D

Ethanol

Question Tags

📚 Subject:Chemistry

📑 Chapter:Haloalkanes And Haloarenes

🎯Topic:Alkylhalides

PYQ YEAR: 2016

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :SN2 reaction, solvents

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