$R - OH\xrightarrow{{PC{l_3}}}{\text{A}}\xrightarrow[{{\text{dry ether}}}]{{Na}}{H_3}C - \mathop C\limits_{\begin{array}{*{20}{c}} | \\ H \end{array}}^{\begin{array}{*{20}{c}} {C{H_3}} \\ | \end{array}} - \mathop C\limits_{\begin{array}{*{20}{c}} | \\ H \end{array}}^{\begin{array}{*{20}{c}} {C{H_3}} \\ | \end{array}} - C{H_3}$ The value of R in above reaction is

$C{H_3} - \mathop C\limits_{\begin{array}{*{20}{c}} | \\ H \end{array}}^{\begin{array}{*{20}{c}} {C{H_3}} \\ | \end{array}} -$

$C{H_3} - \mathop C\limits_{\begin{array}{*{20}{c}} | \\ {C{H_3}} \end{array}}^{\begin{array}{*{20}{c}} {C{H_3}} \\ | \end{array}} -$

${H_3}C - \mathop C\limits_{\begin{array}{*{20}{c}} | \\ {C{H_3}} \end{array}}^{\begin{array}{*{20}{c}} {C{H_3}} \\ | \end{array}} - C{H_2} -$

Back to ALCOHOLS & PHENOLS & ETHERS

Your Progress

0 / 193 Answered

Correct

Incorrect

Accuracy

JEE • CHEMISTRY • ALCOHOLS & PHENOLS & ETHERS

Alcohols & phenols & ethers practice · Mixed difficulty

Try a question, then open “View answer” to check it. Sign in to submit answers and save progress.

Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

Take a chapter quiz →

Showing 1-30 of 193 questions

1 Easy

1 of 193

Analyzing +4 | -1

Assertion (A): Isopropyl alcohol is preferred over ethanol.

Reason (R): Isopropyl alcohol is used as an antiseptic for skin before giving injections.

View answer and explanation

Correct option: B

Both

\mathrm{A}

and

\mathrm{R}

are correct;

\mathrm{R}

is not the correct explanation of

\mathrm{A}

Option B is correct because both the assertion and reason are correct, but the reason does not explain why isopropyl alcohol is preferred over ethanol in general.

2 Easy

2 of 193

Remembering +4 | -1

Germinated Barley (an enzyme) is a source of enzyme:

View answer and explanation

Correct option: B

Diastase

Option B (Diastase) is correct because germinated barley (malt) is a well-known source of the enzyme diastase, which breaks down starch into maltose.

3 Easy

3 of 193

Understanding +4 | -1

The process of converting alkyl halides into alcohols involves

View answer and explanation

Correct option: B

substitution reaction

Option B (substitution reaction) is correct because the hydroxyl group (OH) replaces the halogen atom (X) in the alkyl halide, which is the definition of a substitution reaction.

4 Easy

4 of 193

Remembering +4 | -1

The b.p. of alcohols are….than corresponding thiols.

View answer and explanation

Correct option: A

Option A (More) is correct because alcohols exhibit hydrogen bonding, which increases their boiling points compared to thiols, which only have weaker van der Waals forces.

5 Medium

5 of 193

Understanding +4 | -1

Which of the following can not be used to oxidise primary alcohols to aldehydes

View answer and explanation

Correct option: C

KMn{O_4}

in acidic medium

The correct answer is C (

KMn{O_4}

in acidic medium) because

KMn{O_4}

in acidic medium is a strong oxidizing agent and will oxidize primary alcohols all the way to carboxylic acids, not just aldehydes.

6 Medium

6 of 193

Understanding +4 | -1

Conc.

\mathrm{H}_2 \mathrm{SO}_4

heated with excess of

\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}

140^{\circ} \mathrm{C}

to form

View answer and explanation

Correct option: A

\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OCH}_2 \mathrm{CH}_3

Option A (

\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OCH}_2 \mathrm{CH}_3

) is correct because the reaction of excess ethanol with concentrated sulfuric acid at 140°C leads to the formation of diethyl ether.

7 Easy

7 of 193

Understanding +4 | -1

The boiling points of thio-ethers are…than those of ether.

View answer and explanation

Correct option: C

Higher

Option C (Higher) is correct because thioethers have higher molecular weights than ethers, leading to stronger van der Waals forces and higher boiling points.

8 Medium

8 of 193

Understanding +4 | -1

Assertion (A):

{C a C l}_2

can't be used for drying ethyl alcohol.

Reason (R): Calcium chloride can form an addition compound with ethyl alcohol.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion

Option A is correct because calcium chloride forms an addition compound with ethyl alcohol, preventing it from acting as a drying agent.

9 Easy

9 of 193

Analyzing +4 | -1

Assertion: Ethers are non-polar when they are symmetrical.

Reason: Ethers have a bent structure.

View answer and explanation

Correct option: D

Assertion is wrong, but reason is correct statement.

Option D is correct. Ethers are polar due to the bent structure and the difference in electronegativity between oxygen and carbon, making the assertion wrong, but the reason is correct.

10 Medium

10 of 193

Remembering +4 | -1

Lucas reagent is used to distinguish among primary, secondary and tertiary:

View answer and explanation

Correct option: B

Alcohols

Option B (Alcohols) is correct because Lucas reagent is specifically used to differentiate between primary, secondary, and tertiary alcohols based on their reactivity with the reagent.

11 Medium

11 of 193

Understanding +4 | -1

Four hydroxy compounds have functional groups as shown

\;\;\;\;\;|

\left( A \right) - \mathrm{C}{\mathrm{H}_2}\mathrm{OH}\left( B \right) - \mathrm{CHOH}\left( C \right)\phi - \mathrm{OH\;}\left( D \right)\phi - \mathrm{CHOH}

\;\;\;\;\;|

The purple colour with

\mathrm{FeC}{\mathrm{l}_3}

will be given by

View answer and explanation

Correct option: C

C\;

only

Option C (C only) is correct because phenols give a violet coloration with ferric chloride due to the formation of a colored iron complex.

12 Medium

12 of 193

Remembering +4 | -1

In the Victor-Meyer's test, the colors given by

1^{\circ}, 2^{\circ}

and

3^{\circ}

alcohols are respectively.

View answer and explanation

Correct option: B

Red, Blue, Colourless

The correct answer is B (Red, Blue, Colourless) because in the Victor-Meyer's test, primary alcohols give a red color, secondary alcohols give a blue color, and tertiary alcohols give a colorless solution.

13 Easy

13 of 193

Analyzing +4 | -1

Which of the following is most acidic?

View answer and explanation

Correct option: C

p -

nitrophenol

Option C (

p -

nitrophenol) is the most acidic because the nitro group is a strong electron-withdrawing group, stabilizing the conjugate base.

14 Medium

14 of 193

Analyzing +4 | -1

R - OH\xrightarrow{{PC{l_3}}}{\text{A}}\xrightarrow[{{\text{dry ether}}}]{{Na}}{H_3}C - \mathop C\limits_{\begin{array}{cccccccccccccccccccc} | \\ H \end{array}}^{\begin{array}{cccccccccccccccccccc} {C{H_3}} \\ | \end{array}} - \mathop C\limits_{\begin{array}{cccccccccccccccccccc} | \\ H \end{array}}^{\begin{array}{cccccccccccccccccccc} {C{H_3}} \\ | \end{array}} - C{H_3}

The value of R in above reaction is

View answer and explanation

Correct option: B

C{H_3} - \mathop C\limits_{\begin{array}{cccccccccccccccccccc} | \\ H \end{array}}^{\begin{array}{cccccccccccccccccccc} {C{H_3}} \\ | \end{array}} -

The correct answer is B (

C{H_3} - \mathop C\limits_{\begin{array}{cccccccccccccccccccc}| \\ H \end{array}}^{\begin{array}{cccccccccccccccccccc} {C{H_3}} \\ | \end{array}} -

) because the given product is formed via a Wurtz reaction, requiring two identical alkyl halides derived from the same alcohol.

15 Easy

15 of 193

Understanding +4 | -1

An unknown alcohol is treated with the Lucas reagent to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest by what mechanism 

View answer and explanation

Correct option: A

Tertiary alcohol by 

S{N^2}

Option C (Tertiary alcohol by

S{N^1}

) is correct because tertiary alcohols react fastest with Lucas reagent via an

S{N^1}

mechanism due to the stability of the tertiary carbocation intermediate.

Explore Other Chapters in CHEMISTRY

View All →

P-BLOCK ELEMENTS 736 MCQs Equilibrium 696 MCQs STRUCTURE OF ATOM 634 MCQs THERMODYNAMICS 536 MCQs CHEMICAL BONDING & MOLECULAR STRUCTURE 514 MCQs SOLUTIONS 480 MCQs

16 Medium

16 of 193

Understanding +4 | -1

Which compound is capable of strong hydrogen bonding?

View answer and explanation

Correct option: C

{\mathrm{C}_2}{\mathrm{H}_5}\mathrm{OH}

Option C (

\mathrm{N}{\mathrm{a}_2}\mathrm{C}{\mathrm{O}_3}

) is correct because sodium carbonate hydrolyzes to form a strong base (NaOH) and a weak acid (

H_2CO_3

17 Easy

17 of 193

Remembering +4 | -1

Dialkyl sulphides are known as:

View answer and explanation

Correct option: C

Thioethers

Option C (Thioethers) is correct because dialkyl sulphides, with the general formula R-S-R', are also known as thioethers.

18 Easy

18 of 193

Remembering +4 | -1

Diethyl ether finds its use in medicine as:

View answer and explanation

Correct option: D

Anaesthetic

Option D is correct. Diethyl ether is used in medicine as an anaesthetic due to its ability to depress the central nervous system.

19 Hard

19 of 193

Analyzing +4 | -1

Assertion:-

\mathrm{m}

- Nitrophenol is less acidic than

\mathrm{p}

- nitrophenol.
Reason:-p-Nitrophenol has intermolecular

\mathrm{H}

-bonding.

View answer and explanation

Correct option: B

If both Assertion & reason are True but Reason is not a correct explanation of the Assertion

Option B (If both Assertion & reason are True but Reason is not a correct explanation of the Assertion) is correct because both the assertion and reason are true, but the reason doesn't explain the assertion.

20 Medium

20 of 193

Analyzing +4 | -1

Decreasing order of boiling points of

n

-pentanol (

A

n

-pentane (

B

), 3-pentanol (

C

) and 2,2-dimethyl propanol (

D

) is :

View answer and explanation

Correct option: A

A,\;C,D,\;B

Option A is correct because boiling point decreases with branching and increases with hydrogen bonding.

21 Easy

21 of 193

Remembering +4 | -1

Which of the following gives violet colour with an alcoholic solution of

\mathrm{FeC}{\mathrm{l}_3}?

View answer and explanation

Correct option: C

Salicylic acid

Option C (Salicylic acid) is correct because salicylic acid gives a violet color with an alcoholic solution of

\mathrm{FeC}{\mathrm{l}_3}

due to the presence of a phenolic group.

22 Easy

22 of 193

Understanding +4 | -1

Diethyl ether on heating with conc. HI gives two moles of

View answer and explanation

Correct option: C

Ethyl iodide

Option C (Ethyl iodide) is correct because diethyl ether reacts with concentrated HI to produce two moles of ethyl iodide.

23 Easy

23 of 193

Understanding +4 | -1

On boiling with conc. hydrobromic acid, phenylethylether will yield:

View answer and explanation

Correct option: A

Phenol and ethyl bromide

Option A (Phenol and ethyl bromide) is correct because the ether bond in phenylethylether is cleaved by HBr, resulting in phenol and ethyl bromide.

24 Medium

24 of 193

Understanding +4 | -1

The compound which will not react with sodium is

View answer and explanation

Correct option: A

Diethyl ether

Option A (Diethyl ether) is correct because ethers are generally unreactive towards sodium metal.

25 Easy

25 of 193

Understanding +4 | -1

There are four alcohols

P,\;Q,\;R\;\mathrm{and}\;S

which have 3, 2, 1 and zero alpha hydrogen atom(s). Which one of the following will not respond to Viktor-Meyer’s test?

View answer and explanation

Correct option: D

S

Option S is correct because tertiary alcohols (with zero alpha hydrogens) do not respond to the Victor Meyer's test.

26 Medium

26 of 193

Analyzing +4 | -1

Which of the following gem diols is stable?

View answer and explanation

Correct option: C

{F_3}C - \mathop {\mathop {{\text{ }}C}\limits_{\begin{array}{cccccccccccccccccccc} | \\ {OH} \end{array}} }\limits^{\begin{array}{cccccccccccccccccccc} {OH} \\ | \end{array}} - H

Option C (

{F_3}C - \mathop {\mathop {{\text{ }}C}\limits_{\begin{array}{cccccccccccccccccccc} | \\ {OH} \\ \end{array}} }\limits^{\begin{array}{cccccccccccccccccccc} {OH} \\ | \\ \end{array}} - H

) is correct because the presence of strong electron-withdrawing groups like

F_3C

stabilizes the geminal diol.

27 Medium

27 of 193

Understanding +4 | -1

Assertion:Phenol reacts with

CH_3 I

in presence of

NaOH

to form methoxybenzene.

Reason: Phenoxide ion is a better nucleophile than phenol.

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

Option A (If both Assertion and Reason are correct and Reason is the correct explanation of Assertion) is correct because phenoxide ion is a stronger nucleophile than phenol due to the negative charge, leading to easier reaction with

CH_3I

28 Easy

28 of 193

Understanding +4 | -1

For drying ether sodium metal can be used, but it cannot be used for drying ethyl alcohol because:

View answer and explanation

Correct option: C

Ethyl alcohol reacts with sodium metal

Option C (Ethyl alcohol reacts with sodium metal) is correct because sodium reacts with ethyl alcohol to produce hydrogen gas, making it unsuitable for drying.

29 Medium

29 of 193

Understanding +4 | -1

Assertion: When alkyl aryl ethers react with excess of hydrogen halides, phenol and alkyl halide are produced.

Reason: Alkyl aryl ethers are cleaved at the alkyl-oxygen bond due to more stable aryl-oxygen bond.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion

The correct answer is A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) because alkyl aryl ethers undergo cleavage at the alkyl-oxygen bond due to the greater stability of the aryl-oxygen bond.

30 Medium

30 of 193

Analyzing +4 | -1

Assertion:- Methoxy ethane has less boiling point than propanol.

Reason:- Methoxy ethane is more polar than propanol.

View answer and explanation

Correct option: C

If Assertion is True but the Reason is False

Option C is correct because while the assertion is true (methoxy ethane has a lower boiling point than propanol), the reason is false (methoxy ethane is less polar than propanol).

Revision notes and key takeaways

Review ALCOHOLS & PHENOLS & ETHERS in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 193 single-correct-answer MCQs on ALCOHOLS & PHENOLS & ETHERS.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

Showing 1-30 of 193 questions

Continue Your Practice

📚 Switch Set (ALL)

Chapter Sets

ALL 193 MCQs EASY 81 MCQs HARD 16 MCQs MEDIUM 96 MCQs

0 /193

0✓ 0✗

0% Accuracy