Free Alcohols and Phenols MCQs with Answers

• A. Carbonic acid
• B. Carbolic acid
• C. Acetic acid
• D. Hydroxy acid

Explanation: Option A: Carbonic acid is a carbon-containing compound that has the chemical formula H2CO3.

• A. Butyl alcohol
• B. Glycol
• C. Glycerol
• D. Propyl alcohol

Explanation: The common name of 1, 2, 3-propanetriol is glycerol. Glycerol is a trihydroxy alcohol commonly used in various industries, including food…

• A. O2
• B. H2
• C. [O] (nascent oxygen)
• D. H

Explanation: In the reaction, the dichromate ion is reduced and generates nascent oxygen ([O]), a highly reactive single atom of oxygen responsible for…

• A. Me-O-Me
• B. Et-O-Et
• C. iPr-O-iPr
• D. All of them

Explanation: Peroxide formation involves radicals as intermediate. So, that ether would readily form peroxide which forms more stable radical.

• A. CH3CHCH3
• B. CH3-CH-CH3
• C. CH3CH2CH2-
• D. CH3CH2CH2+

Explanation: Dehydration of alcohols proceeds by carbocation intermediate. A primary alcohol initially gives a primary carbocation, which rearranges to…

• A. Primary alcohols
• B. Teritary alcohol
• C. Secondary alcohols
• D. All

Explanation: Isobutyl alcohol and isopentyl alcohol are primary alcohols because the hydroxyl (-OH) group is attached to a carbon atom that is bonded…

• A. Alkaline aqueous I2
• B. K2Cr2O7 in dil. H2SO4
• C. Aqueous NaHCO3
• D. Na metal

Explanation: Methanol gets oxidized by acidified K2Cr2O7 but phenol does not.

• A. O2
• B. H2
• C. O
• D. H

Explanation: K2Cr2O7+ 4H2SO4 → K2SO4 + Cr(SO4)3 + 4H2O+3[O] This is an esterification reaction.

• A. C6H6ONa. .
• B. C7H6O
• C. C6H4OH
• D. C6H5ONa

Explanation: Phenol reacts with alkalis to form salts for example:

• A. Ketones
• B. Malonic acid
• C. Aldehydes
• D. Alkene

Explanation: Tertiary alcohols do not undergo oxidation with acidified potassium permanganate (KMnO4). They give no reaction.

• A. Organic acid
• B. Aldehyde
• C. Ether
• D. Ketone

Explanation: Option D is correct.Oxidation of secondary alcohols gives ketones. The oxidation of secondary alcohols is a two-step process.

• A. All of these features of college life have their place, and should receive the support of those students who is interested in them.
• B. All of these features of college life have its place, and should receive the support of those students who are interested in them.
• C. All of these features of college life has their place, and should receive the support of those students who are interested in them.
• D. All of these features of college life have their place, and should receive the support of those students who are interested in them.

Explanation: All of these features of college life have their place, and should receive the support of those students who are interested in them.

• A. There was a continual cracking noise that was the wood of the trunk splitting.
• B. There was a continual cracking noise that was wood of the trunk splitting.
• C. There was a continual cracking noise that was a wood of the trunk splitting.
• D. There was continual cracking noise that was the wood of trunk Splitting.

Explanation: The sentence is structured correctly, using the phrase "the wood of the trunk splitting" to indicate the source of the noise.

• A. Jan asked; "What did Joe mean when he said, 'I will see you later.'"
• B. Jan asked, "What did Joe mean when he said, 'I will see you later?'"
• C. Jan asked, "What did Joe mean when he said, 'I will see you later'?"
• D. Jan asked, "What did Joe mean when he said, 'I will see you later'"?

Explanation: It places the question mark correctly inside the double quotation marks, indicating that the entire sentence is a question, but outside…

• A. 2, 4 - DNPH test
• B. Tollen's test
• C. Lucas test
• D. Fehling's solution test

Explanation: The "Lucas test" uses Lucas Reagent, which is a solution of Anhydrous zinc in concentrated H2SO4.

• A. 2-propanol
• B. 1- propanol
• C. 2 - ethanol
• D. 2 - propane-1-ot

Explanation: Reason: Isopropyl alcohol is another name for 2-propanol.

• A. CH3CH2OH
• B. CH3COOCH3
• C. CH3COCH3
• D. CH3CHO

Explanation: A Grignard reagent reacts with compounds containing active H atom, such as water, ammonia, amines, alcohols, alkynes etc., to form a…

• A. H3PO4
• B. H3PO2
• C. HPO3
• D. H3PO3

Explanation: 3 moles of OH- react with one mole of Phosphorus to form one mole of P(OH)3 or H3PO3. 3C2H5OH+PBr3→3C2H5Br + H3PO3

• A. CH3 CO2 H and NaOH
• B. C6H5OH and Na
• C. C6H5NH2 and HCl
• D. CH3CO2H and PCl5
• E. CH3COCH3 and LiAlH4

Explanation: Option E is correct because it leads to a reduction reaction of a ketone which forms a secondary alcohol which is a neutral substance.

• A. Ketone
• B. Aldehyde
• C. Ester
• D. Amide

Explanation: Oxidation of primary alcohol leads to the formation of aldehyde.