Alcohols, Phenols and Ethers Class 12 Worksheet with Answers

Classification and Nomenclature

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Classification and Nomenclature under Alcohols, Phenols and Ethers for Grade 12 CBSE.

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1.
$Which of the following represents an allylic alcohol?$
A. $CH_{2}=CH-OH$
B. $CH_{3}-CH=CH-CH_{2}OH$
C. $C_{6}H_{5}-OH$
D. $CH_{3}OH$
2.
$(CH_{3})_{3}C-OH$
A. $2-Methylpropan-2-ol$
B. $Butan-2-ol$
C. $2-Methylpropan-1-ol$
D. $Butan-1-ol$
3.
$In the naming of ethers as 'Alkoxyalkanes', the 'alkoxy' part is derived from the:$
A. $Longer alkyl chain$
B. $Shorter alkyl chain$
C. $Aromatic ring always$
D. $Chain with more substituents$
4.
$The common name of Ethane-1,2-diol is:$
A. $Glycerol$
B. $Ethylene glycol$
C. $Propylene glycol$
D. $Catechol$
5.
$CH_{3}-CH(CH_{3})-CH_{2}-O-CH_{2}-CH_{3}$
A. $1-Ethoxy-2-methylpropane$
B. $2-Ethoxy-2-methylpropane$
C. $Ethoxyisobutane$
D. $Ethyl isobutyl ether$
6.
$CH_{3}-CH(OH)-CH=CH_{2}$
A. $Primary allylic alcohol$
B. $Secondary allylic alcohol$
C. $Tertiary allylic alcohol$
D. $Secondary vinylic alcohol$
7.
$CH_{3}-CH(OH)-CH_{2}-CH_{2}-Cl$
A. $4-Chlorobutan-2-ol$
B. $1-Chlorobutan-3-ol$
C. $4-Chlorobutan-3-ol$
D. $2-Hydroxy-4-chlorobutane$
8.
$Determine the IUPAC name of the compound represented in the following structural diagram:$
A. $2-ethoxy-2-methylbut-3-en-1-ol$
B. $2-methyl-2-ethoxybut-3-en-1-ol$
C. $3-ethoxy-3-methylbut-1-en-4-ol$
D. $3-methyl-3-ethoxybut-1-en-4-ol$
9.
$CH_{3}-CH_{2}-O-CH(CH_{3})-CH_{2}-CH_{3}$
A. $2-ethoxybutane$
B. $1-methylpropoxyethane$
C. $Ethyl secondary-butyl ether$
D. $3-ethoxybutane$
10.
$In naming alcohols with a double bond, which rule is correct?$
A. $The carbon chain is numbered to give the double bond the lowest locant.$
B. $The carbon chain is numbered to give the hydroxyl group the lowest locant.$
C. $The double bond and hydroxyl group are given equal priority.$
D. $The longest chain must contain only the double bond.$

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Structures of Functional Groups

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Structures of Functional Groups under Alcohols, Phenols and Ethers for Grade 12 CBSE.

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1.
$C-O$
A. $An alkyl group$
B. $An aromatic ring$
C. $A carbonyl group$
D. $An alkyne group$
2.
$How many hydrogen atoms are directly bonded to the oxygen atom in a molecule of methoxymethane?$
A. $0$
B. $1$
C. $2$
D. $3$
3.
$C-O-C$
A. $Alcohols$
B. $Ethers$
C. $Phenols$
D. $Ketones$
4.
$The dipole moment of methanol is roughly:$
A. $0 D$
B. $1.7 D$
C. $3.9 D$
D. $0.5 D$
5.
$Which of the following features is common to the oxygen atom in both alcohols and ethers?$
A. $sp^2$
B. $It possesses two lone pairs of electrons$
C. $\pi$
D. $It is bonded to at least one hydrogen atom$
6.
$C-O-C$
A. $Hydrogen is more electronegative than carbon$
B. $Alkyl groups are more bulky than hydrogen atoms$
C. $Ethers have no lone pairs$
D. $Alcohols have more resonance$
7.
$CH_3-O-CH_3$
A. $Alcohols$
B. $Phenols$
C. $Aldehydes$
D. $C=O$
8.
$C-O$
A. $The bond in vinyl alcohol is longer.$
B. $The bond in vinyl alcohol is shorter due to resonance.$
C. $Both are of equal length.$
D. $C-O$
9.
$C-O-C$
A. $C-O$
B. $It decreases the bond angle by providing more space for the lone pairs.$
C. $It has no effect on the bond angle.$
D. $It makes the ether molecule perfectly linear.$
10.
$sp^{3}$
A. $p$
B. $s$
C. $sp^{3}$
D. $sp^{2}$

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Preparation and Properties of Alcohols and Phenols

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Preparation and Properties of Alcohols and Phenols under Alcohols, Phenols and Ethers for Grade 12 CBSE.

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1.
$H_2SO_4$
A. $Benzene sulfonic acid$
B. $p-Phenolsulfonic acid$
C. $o-Phenolsulfonic acid$
D. $Nitrobenzene$
2.
$Which of the following compounds has the highest solubility in water?$
A. $CH_3OH$
B. $C_2H_5OH$
C. $C_3H_7OH$
D. $C_4H_9OH$
3.
$The conversion of an alkene to an alcohol by treating it with water in the presence of an acid follows:$
A. $Saytzeff's rule$
B. $Markownikoff's rule$
C. $Anti-Markownikoff's rule$
D. $Hund's rule$
4.
$CH_3-CH(OH)-CH_2-CH_3$
A. $Butan-1-ol$
B. $Butan-2-ol$
C. $Propan-2-ol$
D. $2-Methylpropan-1-ol$
5.
$The acidity of alcohols decreases in the order:$
A. $Primary > Secondary > Tertiary$
B. $Tertiary > Secondary > Primary$
C. $Secondary > Primary > Tertiary$
D. $Primary > Tertiary > Secondary$
6.
$The reaction between an alcohol and an acid chloride in the presence of pyridine is called:$
A. $Esterification$
B. $Acetylation$
C. $Benzoylation$
D. $Schotten-Baumann reaction$
7.
$Which reagent converts a primary alcohol directly into a carboxylic acid?$
A. $PCC$
B. $KMnO_4 / H^+$
C. $CrO_3 / Pyridine$
D. $Cu / 573 K$
8.
$An alkene 'X', 3,3-dimethylbut-1-ene, is subjected to three different reaction pathways to produce alcohols A, B, and C as shown in the flowchart. Which of the following correctly identifies the IUPAC names of these major products?$
A. $A = 3,3-dimethylbutan-2-ol, B = 2,3-dimethylbutan-2-ol, C = 3,3-dimethylbutan-1-ol$
B. $A = 2,3-dimethylbutan-2-ol, B = 3,3-dimethylbutan-2-ol, C = 3,3-dimethylbutan-1-ol$
C. $A = 2,3-dimethylbutan-2-ol, B = 3,3-dimethylbutan-1-ol, C = 3,3-dimethylbutan-2-ol$
D. $A = 3,3-dimethylbutan-1-ol, B = 3,3-dimethylbutan-2-ol, C = 2,3-dimethylbutan-2-ol$
9.
$Phenol reacts with benzene diazonium chloride in basic medium to give an orange-colored dye. The structure of this dye is:$
A. $p-Hydroxyazobenzene$
B. $o-Hydroxyazobenzene$
C. $m-Hydroxyazobenzene$
D. $Aniline blue$
10.
$K_{2}Cr_{2}O_{7}$
A. $Ethanol$
B. $Propan-2-ol$
C. $2-Methylpropan-2-ol$
D. $Butan-1-ol$

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Commercial Importance of some Alcohols

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Commercial Importance of some Alcohols under Alcohols, Phenols and Ethers for Grade 12 CBSE.

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1.
$Molasses is a byproduct of which industry?$
A. $Steel industry$
B. $Paper industry$
C. $Sugar industry$
D. $Textile industry$
2.
$In the metabolism of methanol, what does methanal further oxidize into?$
A. $Formaldehyde$
B. $Methanoic acid$
C. $Methane$
D. $Carbon monoxide$
3.
$Which alkene is the starting material for the large-scale production of ethanol via hydration?$
A. $Methane$
B. $Ethene$
C. $Propene$
D. $Butene$
4.
$What is the purpose of adding pyridine to commercial ethanol?$
A. $To increase its sweetness$
B. $To give it a foul smell to prevent drinking$
C. $To increase its alcohol percentage$
D. $To make it clear and transparent$
5.
$The enzyme maltase is specific for the hydrolysis of the glycosidic bond in maltose. What are the products of this reaction?$
A. $One molecule of glucose and one of fructose$
B. $Two molecules of glucose$
C. $Two molecules of fructose$
D. $One molecule of glucose and one of galactose$
6.
$When comparing the toxicity of alcohols, which statement is scientifically accurate regarding the metabolism of ethanol in the liver?$
A. $Ethanol is metabolized into methanol which is toxic$
B. $Ethanol is oxidized to acetaldehyde and then to acetic acid$
C. $Ethanol causes immediate coagulation of brain proteins$
D. $Ethanol is not metabolized and is excreted unchanged$
7.
$Methanol is used in the manufacture of various polymers. Which specific polymer is made using formaldehyde derived from methanol?$
A. $Polyethylene$
B. $Bakelite$
C. $Nylon-6,6$
D. $PVC$
8.
$H_{2}$
A. $CO$
B. $CO$
C. $ZnO_{2}$
D. $It would lead to the formation of higher alcohols like ethanol and propanol.$
9.
$Why is 'Absolute Alcohol' rarely used as a solvent in common laboratory procedures when 'Rectified Spirit' can suffice?$
A. $Absolute alcohol is highly explosive compared to rectified spirit.$
B. $Absolute alcohol is extremely hygroscopic and absorbs moisture from the air rapidly.$
C. $Absolute alcohol has a much higher toxicity than rectified spirit.$
D. $Absolute alcohol does not dissolve organic compounds as well as rectified spirit.$
10.
$In the catalytic conversion of synthesis gas to methanol, what is the role of the high pressure with respect to the catalyst's lifetime?$
A. $It prevents the deposition of carbon (coking) on the catalyst surface.$
B. $It causes the catalyst particles to crush, increasing surface area.$
C. $It helps in the desorption of the methanol product from the catalyst surface.$
D. $It forces the reactants into the pores of the catalyst.$

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Preparation and Properties of Ethers

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Preparation and Properties of Ethers under Alcohols, Phenols and Ethers for Grade 12 CBSE.

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1.
$Why is diethyl ether stored in dark colored bottles?$
A. $To prevent its evaporation$
B. $To prevent the formation of peroxides by light$
C. $To keep it cool$
D. $To distinguish it from water$
2.
$Identify the common name for the simplest ether.$
A. $Dimethyl ether$
B. $Methyl ethyl ether$
C. $Diethyl ether$
D. $Methoxy methane$
3.
$HI$
A. $tert-Butyl iodide and Methanol$
B. $tert-Butyl alcohol and Methyl iodide$
C. $Isobutylene and Methanol$
D. $tert-Butyl iodide and Methyl iodide$
4.
$Which of the following will not react with metallic sodium?$
A. $Ethanol$
B. $Phenol$
C. $Diethyl ether$
D. $Ethanoic acid$
5.
$C_2H_5OC_2H_5$
A. $Ethyl hydrogen sulfate$
B. $Diethyloxonium hydrogen sulfate$
C. $Diethyl sulfate$
D. $Ethane sulfonic acid$
6.
$An ether is synonymous with which of the following functional groups?$
A. $Dialkyl oxides$
B. $Alkyl alkanoates$
C. $Alkanols$
D. $Alkanals$
7.
$When anisole is treated with bromine in the absence of a Lewis acid catalyst, it still undergoes bromination. This is because:$
A. $The methoxy group is highly activating$
B. $Bromine is a very strong electrophile$
C. $Acetic acid acts as a catalyst$
D. $Anisole is more reactive than benzene$
8.
$CH_3COCl$
A. $4-ethyliodobenzene and methanol$
B. $Phenol and ethyl iodide$
C. $4-ethylphenol and methyl iodide$
D. $4-iodoacetophenone and methyl iodide$
9.
$Identify the compound that will NOT undergo Williamson ether synthesis when treated with sodium methoxide.$
A. $Chlorobenzene$
B. $Ethyl bromide$
C. $Benzyl chloride$
D. $Isopropyl iodide$
10.
$What happens when diethyl ether is exposed to sunlight for a long time?$
A. $It decomposes into ethane and oxygen.$
B. $It forms explosive ethoxide peroxides.$
C. $It evaporates completely without changing chemically.$
D. $It reacts with nitrogen to form nitro compounds.$

Download the worksheet for Alcohols, Phenols and Ethers - Preparation and Properties of Ethers to practice offline. It includes additional chapter-level practice questions.

Alcohols, Phenols and Ethers

Classification and Nomenclature

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Structures of Functional Groups

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Preparation and Properties of Alcohols and Phenols

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Commercial Importance of some Alcohols

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Preparation and Properties of Ethers

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