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101.	What is the correct common name of 2-Bromophenol?(a) 2-Bromophenol(b) m-Bromophenol(c) o-Bromophenol(d) 2-HydroxybromobenzeneI had been asked this question during an online interview.My question is from Alcohols, Phenols and Ethers Nomenclature topic in division Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» The correct CHOICE is (c) o-Bromophenol For EXPLANATION: PHENOL is used as the common as well as the IUPAC name and haloarenes with HYDROXY groups are named as halo derivatives of phenols.

102.	Which of the following is not a polyhydric alcohol?(a) Cyclohexanol(b) Ethylene glycol(c) Propylene glycol(d) Benzene-1,2-diolI have been asked this question in an online quiz.My query is from Alcohols, Phenols and Ethers Nomenclature topic in division Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» The correct OPTION is (a) Cyclohexanol The best I can EXPLAIN: Polyhydric alcohols have TWO or more HYDROXYL groups in their structure and are named as either GLYCOLS in the common system or as diols and triols in the IUPAC system.

103.	What is the final major product of Reimer-Tiemann reaction?(a) Salicylic acid(b) o-Salicylaldehyde(c) m-Salicylaldehyde(d) p-SalicylaldehydeI got this question by my college professor while I was bunking the class.Question is from Alcohols and Phenols in division Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» CORRECT choice is (b) o-Salicylaldehyde Easy explanation: PHENOL is first treated with CHLOROFORM and NaOH to form an INTERMEDIATE substituted benzal chloride (with-CHO group substituted at ortho position of aromatic ring). This is then hydrolysed in the PRESENCE of an alkali to form 2-Hydroxy benzaldehyde or o-Salicylaldehyde.

104.	Which of the following alcohols is the most reactive towards esterification reaction?(a) CH3OH(b) CH3CH2OH(c) (CH3)2CHOH(d) (CH3)3COHThis question was posed to me during an online exam.The origin of the question is Alcohols and Phenols topic in chapter Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» The correct choice is (a) CH3OH Easiest EXPLANATION: Presence of bulky GROUPS reduces the REACTIVITY of alcohols and carboxylic acid towards esterification due to EFFECT of stearic hinderance. Therefore, the tertiary alcohols are least REACTIVE.

105.	Identify the incorrect name for CH3-O-C6H5.(a) Methyl phenyl ether(b) Methoxybenzene(c) Anisole(d) PhenetoleThe question was posed to me by my school teacher while I was bunking the class.Query is from Alcohols, Phenols and Ethers Nomenclature topic in portion Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Right OPTION is (d) Phenetole Best EXPLANATION: This is an aromatic ether with a methoxy substituent and has the COMMON name anisole or METHYL PHENYL ether.

106.	R-O-R, where R represent an alkyl or aryl group is the general formula of which compound?(a) Ether(b) Ester(c) Aldehyde(d) KetoneThe question was posed to me by my college director while I was bunking the class.My enquiry is from Alcohols, Phenols and Ethers Classification in section Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Right choice is (a) Ether Easiest explanation: ETHERS are compounds where the hydrogen of a hydrocarbon is replaced by an alkoxy or aryloxy GROUP. It MAY also be THOUGHT of as compounds formed when the hydrogen of the OH group of an alcohol is replaced by an ALKYL or aryl group.

107.	Which of the following is not a vinylic alcohol?(a) CH2=CH-OH(b) HO-CH=CH-CH3(c) CH2=CH-CH2-OH(d) CH3-CH2-CH=CH-OHThe question was posed to me in an international level competition.My question is taken from Alcohols, Phenols and Ethers Classification topic in portion Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Correct option is (c) CH2=CH-CH2-OH Explanation: VINYLIC alcohols contain an OH group bonded to a sp^2 hybridised carbon of a double BOND. CH2=CH-CH2-OH is an allylic alcohol.

108.	Primary alcohols van be benzylic in nature.(a) True(b) FalseThis question was posed to me in a national level competition.I would like to ask this question from Alcohols, Phenols and Ethers Classification in section Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» RIGHT choice is (a) True For explanation: BENZYLIC alcohols contain a sp^3 C-OH bond next to an aromatic ring, which MEANS that the C atom can have zero or two ALKYL groups attached to it ALONG with the ring and OH group.

109.	Propene when reacted with water in the presence of H2SO4 gives _________(a) Propan-1-ol(b) Propan-2-ol(c) 2-Methylpropan-1-ol(d) 2-Methylpropan-2-olThe question was posed to me by my college director while I was bunking the class.The query is from Alcohols and Phenols topic in division Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Right option is (b) Propan-2-ol Explanation: Since PROPENE is an unsymmetrical alkene, the GIVEN hydration REACTION takes place in accordance to Markovnikov’s rule, to form propan-2-ol. The double bond is BROKEN and the OH group attaches at the second CARBON.

110.	How are alcohols prepared from haloalkanes?(a) By treating with concentrated H2SO4(b) By heating with aqueous NaOH(c) By treating with a strong reducing agent(d) By treating with Mg metalThe question was posed to me in semester exam.My question comes from Alcohols and Phenols in chapter Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Right option is (b) By heating with aqueous NaOH Explanation: Haloalkanes when heated with aqueous NaOH or KOH give respective ALCOHOLS. This is a nucleophilic substitution REACTION where the halide group is REPLACED by the OH NUCLEOPHILE.

111.	Which of the following compounds contain an aryl carbon?(a) Ethanol(b) Benzyl alcohol(c) Vinyl alcohol(d) PhenolI had been asked this question in an interview for internship.I would like to ask this question from Alcohols, Phenols and Ethers Classification in chapter Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» The correct OPTION is (d) Phenol The BEST explanation: The sp^2 hybridised CARBON of an aromatic ring to which the hydroxyl GROUP is attached is called an aryl carbon. In phenol, the OH group is attached to an aryl carbon.

112.	Cumene hydroperoxide on hydrolysis with dilute H2SO4 gives _________(a) alcohol and phenol(b) only phenol(c) phenol and acetone(d) alcohol and acetoneThis question was posed to me in an internship interview.Asked question is from Alcohols and Phenols in portion Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Correct OPTION is (c) phenol and ACETONE To elaborate: When cumene hydroperoxide is hydrolysed with a solution of dilute acid, it RESULTS in the formation of phenol and acetone, of which the latter is OBTAINED in large quantities.

113.	Aspirin is produced from the reaction between salicylic acid and which compound?(a) Acetyl chloride(b) Acetic anhydride(c) Phenyl acetate(d) Benzoyl chlorideI got this question in quiz.Enquiry is from Alcohols and Phenols topic in section Alcohols, Phenols and Ethers of Chemistry – Class 12
Answer» Right choice is (b) Acetic ANHYDRIDE The explanation is: Salicylic ACID, which is a phenolic acid when treated with acetic anhydride produces acetyl salicylic acid, also known as ASPIRIN.

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