Free Alcohols and Phenols MCQs with Answers

• A. Tollen's reagent
• B. Br2(aq)
• C. NaHCO3
• D. HCl

Explanation: Phenol reacts with aqueous bromine to give a white precipitate, while ethanol does not react with bromine water.

• A. C6H6ONa
• B. C7H6O
• C. C6H5OH
• D. C6H5ONa

Explanation: Phenol (carbolic acid) is acidic and reacts with a strong base like sodium hydroxide (caustic soda) in an acid-base reaction.

• A. lodoform test
• B. Na-metal
• C. Aq. Br2
• D. Lucas reagent

Explanation: Both phenol and ethanol have an acidic proton on their hydroxyl groups and will react with active metals like sodium to produce hydrogen…

• A. Nitration
• B. Esterification
• C. Sulphonation
• D. Bromination

Explanation: Nitration, sulphonation, and bromination are all electrophilic aromatic substitution reactions that occur on the benzene ring of phenol.

• A. Shorter C - O bond distance
• B. Stable base
• C. Stronger acidic character
• D. All of these

Explanation: In phenoxide ion, the unshared electron pair on the oxygen atom participates in resonance with the aromatic ring, creating a conjugated…

• A. Methanol
• B. Ethanol
• C. Propanol
• D. Butanol

Explanation: Alcohol that gives stable alkoxide ion are more acidic stability order of R-O-. CH3O- > C2H5O- > C3H7O- > C4H9O-

• A. Phthalic acid
• B. Malonic acid
• C. Tartaric acid
• D. Picric acid

Explanation: Picric acid, also known as 2,4,6-trinitrophenol (TNP), is an aromatic compound with the molecular formula C6H3N3O7.

• A. Alkane
• B. Phenol
• C. Alcohol
• D. Benzene

Explanation: Option B is correct.Yes, the compound 'z' is phenol. Phenol is an aromatic compound with the formula C6H5OH.

• A. Ter.Butyl alcohol
• B. n-Propyl alcohol
• C. Isopropyl alcohol
• D. Have same reactivity

Explanation: The reactivity of alcohols towards sodium metal follows the same order as the order of acidity of alcohols.

• A. Soluble in water
• B. Insoluble in water
• C. Soluble in water on heating
• D. Insoluble in all solvents

Explanation: Alcohols of low molecular weight are soluble in water. This is because the alcohols can form hydrogen bonds with water molecules.

• A. Carbene
• B. Carbocation
• C. Carbanion
• D. Free radical

Explanation: Option B is correct.The intermediate in acid-catalyzed dehydration of alcohols is a carbocation.

• A. P° alcohol
• B. T° alcohol
• C. S° alcohol
• D. Cannot be predicated

Explanation: Option A is correct. Primary (P°) alcohols are more reactive where the O-H bonds break because the steric hindrance around the carbon atom…

• A. CH3CH(OH)CH3
• B. HCH2OH
• C. CH3CH2OH
• D. CH3COCH3

Explanation: The correct answer is Option B: HCH2OH (methanol) because it does not contain the Ch3Ch(oh)- group, which is required for a positive…

• A. CH3-OH
• B. 3HC-H2C-CH2-OH
• C. CH3-CH2-OH
• D. (CH3)3COH

Explanation: The order of reactivity with respect to O-H bonds is CH3OH> primary alcohol >secondary alcohol >tertiary alcohol.

• A. CH3CH2CH2CH2OH
• B. (CH3)2CHCH2OH
• C. (CH3)3COH
• D. CH3CHOHCH2CH3

Explanation: CH3CH2CH2CH2OH (1-butanol, primary) → most stable ion(CH3)2CHCH2OH (isobutanol, primary branched) → nextCH3CH(OH)CH2CH3 (2-butanol…

• A. Na
• B. Aq.Br2
• C. Iodoform test
• D. NaOH

Explanation: Phenol and alcohol both react with Na. Therefore, they cannot be distinguished by it.

• A. 25°C
• B. Above 68.5°C
• C. 62.3°C
• D. 66.50°C

Explanation: Phenols can only dissolve in water at temperatures ,above 68.5°C.

• A. Propanol
• B. Pentanol
• C. Butanol
• D. Hexanol

Explanation: Lower Alcohols are more readily soluble in water as compared to Higher alcohols.

• A. Phenol
• B. Alcohols
• C. Carboxylic acid
• D. Amines

Explanation: The lone pair of electron at O is greatly pulled by 2 electronegative atoms C and O so the electron density at the other O decreases and…

• A. Alcohol
• B. Alkyl halide
• C. Phenol
• D. Ether

Explanation: Alcohols is the most suitable option. It reacts with Na to give alkoxides which reacts with alkyl halides to give ethers.