NEET Chemistry MCQ: NCERT Alcohol Dehydration | NEET.Guide Questions

Predict the major product formed when 2-methyl-2-butanol is treated with a mixture of concentrated $H_2SO_4$ and $H_3PO_4$ at high temperature.

A

2-methyl-1-butene

B

2-methyl-2-butene

C

3-methyl-1-butene

D

A mixture of 2-methyl-1-butene and 2-methyl-2-butene in equal amounts

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :Alcohols, Dehydration, Elimination Reactions, E1, Zaitsev's Rule

Related Questions

Vapours of an alcohol were passed over hot reduced copper. It gave an olefin. The alcohol is:

A

Primary

B

Secondary

C

Tertiary

D

None of these

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Alcohol reactions, Dehydration, Elimination reactions

The starting material for the preparation of ${\rm{C}}{{\rm{H}}_3}{\rm{I}}$ in one step reaction is:

A

${\rm{C}}{{\rm{H}}_3}{\rm{OH}}$

B

${{\rm{C}}_2}{{\rm{H}}_5}{\rm{OH}}$

C

${\rm{C}}{{\rm{H}}_3}{\rm{CHO}}$

D

${\rm{C}}{{\rm{H}}_3}{\rm{COC}}{{\rm{H}}_3}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Reaction of alcohols with hydrogen halides, Nucleophilic substitution reactions

${\rm{R}}-{\rm{CH}} = {\rm{C}}{{\rm{H}}_2}$ reacts with ${{\rm{B}}_2}{{\rm{H}}_6}$ in presence of ${{\rm{H}}_2}{{\rm{O}}_2}$ to give:

A

$R{\rm{COC}}{{\rm{H}}_3}$

B

$R{\rm{CHOHC}}{{\rm{H}}_2}{\rm{OH}}$

C

$R{\rm{C}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_2}{\rm{OH}}$

D

$R{\rm{C}}{{\rm{H}}_2}{\rm{CHO}}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Hydroboration-oxidation, Alkene reactions, Regioselectivity, Anti-Markovnikov addition

Ethylene glycol reacts with excess of ${\rm{PC}}{{\rm{I}}_5}$ to give

A

1, 1-dichloroethane

B

1, 2-dichloroethane

C

1, 1, 1-trichloroethane

D

2, 2-dichloroethane

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Reaction of alcohols with PCl5, nucleophilic substitution

An aldehyde on treatment with ${\rm{Zn}}/{\rm{HC}}$ yields:

A

${1^ \circ }$ alcohol

B

${2^ \circ }$ alcohol

C

${3^ \circ }\;$ alcohol

D

None of these

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Reduction of aldehydes, Reducing agents, Primary alcohols

Pepperment can be extracted from plant sources by using solvents like:

A

${\rm{N}}{{\rm{H}}_3}$

B

${{\rm{H}}_2}{\rm{O}}$

C

${\rm{C}}{{\rm{H}}_3}{\rm{COOH}}$

D

${{\rm{C}}_2}{{\rm{H}}_5}{\rm{OH}}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :Solvent Extraction, Polarity, Organic Chemistry

Predict the major product formed when 2-methyl-2-butanol is treated with a mixture of concentrated $H_2SO_4$ and $H_3PO_4$ at high temperature.

A

2-methyl-1-butene

B

2-methyl-2-butene

C

3-methyl-1-butene

D

A mixture of 2-methyl-1-butene and 2-methyl-2-butene in equal amounts

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :Alcohols, Dehydration, Elimination Reactions, E1, Zaitsev's Rule

${\rm{C}}{{\rm{H}}_3}{\rm{COOH}}$ reacts rapidly with:

A

${\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}{\rm{OH}}$

B

${\left( {{\rm{C}}{{\rm{H}}_3}} \right)_2}{\rm{CHOH}}$

C

${\left( {{\rm{C}}{{\rm{H}}_3}} \right)_3}{\rm{COH}}$

D

All of these

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :carboxylic acid reactivity, steric hindrance, nucleophilic attack, esterification

If there be a compound of the formula ${\rm{C}}{{\rm{H}}_3}{\rm{C}}{\left( {{\rm{OH}}} \right)_3}$ , which one of the following compounds would be obtained form it without treatment with any reagent?

A

Methanol

B

Ethanol

C

Acetic acid

D

Formaldehyde

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Organic Chemistry, Stability of geminal diols/triols, Dehydration, Carboxylic acid formation

When ethyl alcohol is heated with conc. ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$ , the product obtained is

A

${\rm{C}}{{\rm{H}}_3}{\rm{COO}}{{\rm{C}}_2}{{\rm{H}}_5}$

B

${{\rm{C}}_2}{{\rm{H}}_2}$

C

${{\rm{C}}_2}{{\rm{H}}_6}$

D

${{\rm{C}}_2}{{\rm{H}}_4}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Alcohols, Phenols And Ethers

🎯Topic:Alcohols

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Dehydration of alcohols, Reaction mechanism, Concentrated sulfuric acid as a dehydrating agent

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