Free Alcohols and Phenols MCQs with Answers

• A. Option A
• B. Option B.
• C. Option C
• D. Option D
• E. Option E

Explanation: This structure is just a factual recall:

• A. It is colourless crystalline molecular solid
• B. It is poisonous in nature
• C. It is used as a disinfectant in hospitals and washrooms
• D. It is sparingly soluble in water

Explanation: Phenol typically appears as a white crystalline solid, but it can also be colorless in its pure form.

• A. p-Cresol
• B. Catechol
• C. Resorcinol
• D. Quinol

Explanation: The explanation for this question will be added soon!

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: The explanation for this question will be added soon!

• A. Mesitylene
• B. Resorcinol
• C. Durene
• D. Anthracene

Explanation: The common name of 1,3-dihydroxybenzene is Resorcinol. The other options are different aromatic compounds:Mesitylene…

• A. Cumene
• B. Toluene
• C. Benzene
• D. Aniline

Explanation: The compound that forms phenol when oxidized by atmospheric oxygen in the presence of a metal catalyst is cumene (isopropylbenzene).

• A. Williamson synthesis
• B. Cannizzaro reaction
• C. Aldol reaction
• D. Kolbe-Schmitt reactio

Explanation: The reaction of the sodium salt of phenol with CO₂ is called the Kolbe-Schmitt reaction.

• A. Mother liquor
• B. Filtrate
• C. Extract
• D. Molasses

Explanation: Molasses is indeed the residue left behind after the crystallization of sugar from concentrated sugar cane juice.

• A. C2H5OH
• B. H2CO3
• C. C6H5OH
• D. H3PO3

Explanation: Carbolic acid is indeed another name for phenol, and its chemical formula is C6H5OH.

• A. Picric acid
• B. o-Nitrophenol
• C. 1,3,5-Trinitrobenzene
• D. p-Nitrophenol

Explanation: When phenol is heated with concentrated nitric acid (HNO3), the product is not 1,3,5-trinitrobenzene.The reaction between phenol and…

• A. As a solvent
• B. As an anti-freezing agent
• C. As a substitute for petrol
• D. For denaturing of ethyl alcohol

Explanation: Methyl alcohol, commonly known as methanol, is not typically used as a substitute for petrol (gasoline) in most conventional automobile…

• A. Vegetable oil
• B. Coal tar
• C. Wood
• D. None of these

Explanation: Phenol was isolated by Runge from coal tar. Phenol was indeed isolated by Friedrich Ferdinand Runge from coal tar.

• A. Iodoform test
• B. Lucas test
• C. Benedict's test
• D. Tollen's test

Explanation: Ethanol and methanol can indeed be distinguished by the iodoform test.The iodoform test is a chemical test used to detect the presence of…

• A. Methanal
• B. Ethanal
• C. Propanal
• D. 2-Hexanone

Explanation: "2-hexanone has more surface area, which is why it has a high boiling point, as it has more bonds to be broken down.

• A. Phenol
• B. Alcohol
• C. Carboxylic acid
• D. Water

Explanation: Relative acidic strength of alcohol, phenol, water and carboxylic acid is as follows:Carboxylic Acids>Phenol>Water>Alcohols The acidic…

• A. C2H6
• B. C2H5Cl
• C. CH3−O−CH3
• D. C2H5OH

Explanation: Alcohols are readily soluble in water but solubility decreases in higher alcohols.

• A. CH3OH
• B. C2H5OH
• C. CH3−O−CH3
• D. C6H5OH

Explanation: Alcohols are readily soluble in water but solubility decreases in higher alcohols.

• A. As a solvent
• B. As an anti-freezing agent
• C. As a substitute for petrol
• D. For denaturing of ethyl alcohol

Explanation: Methanol is used as a solvent for fats oils, paints, varnishes. It isalso used as antifreeze in the radiators of automobiles and…

• A. 80%
• B. 85%
• C. 90%
• D. 95%

Explanation: Alcohol obtained by fermentation is only upto 12% and never exceeds14% because beyond this limit enzymes become inactive.

• A. Carbolic acid
• B. H2O
• C. Methanol
• D. Butanoic acid

Explanation: OPTION A: Carbolic acid is a weak organic acid with a pKa of around 10.