CBSE Questions for Class 12 Medical Chemistry Alcohols, Phenols And Ethers Quiz 4 - MCQExams.com

$$CH_3-\underset{CH_3}{\underset{|}{C}H}-\underset{OH}{\underset{|}{C}H}-\underset{CH_3}{\underset{|}{\overset{CH_3\!\!\!\!\!}{\overset{|}{C}}}-}CH_3$$

The IUPAC name of the above given compound is:
  • 2,2,4-Trimethylpentan-3-ol
  • 2,4,4-trimethylpentan-3-ol
  • 2-methyl-1-(2-methylpronyl)-propanol
  • none of the above
Which of the following is the most basic in character?
  • $$\displaystyle H_{2}O$$
  • $$\displaystyle CH_{3}CH_{2}OH$$
  • $$\displaystyle CH_{3}OCH_{3}$$
  • $$\displaystyle CH_{3}OH$$
$$CH_3 - \underset{OH}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - CH_2 - CH_3$$
The correct IUPAC name of the above compound is:
  • tert- amyl alcohol
  • 2-methylbutan-2-ol
  • 2-methylpentan-2-ol
  • 1,1 dimethyl propan-1-ol
 IUPAC name of the given compound is:
248668_d3c6783822494f94a926e4d0fd678768.PNG
  • 5-ethylheptane-2.4-diol
  • 3-ethylheptane-4,6-diol
  • 4-ethyl-1-methylhexane-1,3-diol
  • none of these
Which of the following is wood alcohol?
  • $$\displaystyle CH_{3}OH$$
  • $$\displaystyle C_{2}H_{5}OH$$
  • 1-Butanol
  • 2-Methyl -1-propanol
Which of the following is most acidic?
  • Benzyl alcohol
  • 2- Butanol
  • tert-Butyl alcohol
  • Hydroxybenzene
Which of the following is produced during the following reaction? 
$$\displaystyle CO\left ( g \right )+H_{2}\left ( g \right )\xrightarrow[ZnO,Cr_{2}O_{3}]{575 K}$$
  • Ethanol
  • Ethanal
  • Methanol
  • Methanal
The $$K_a$$ values of alcohols, water and phenol are of order $$10^{17}, 10^{14}$$ and $$10^{10}$$ respectively. Which of the following reactions is possible?

$$(I)\,\,C_6H_5O^\circleddash  + H_2O \rightarrow  C_6H_5OH + OH^\circleddash$$
$$  (II)\,\, C_2H_5O^\circleddash  + H_2O \rightarrow  C_2H_5OH + OH^\circleddash $$
  • Both I and II
  • Only II
  • Only I
  • Neither of two
When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place. What are the correct steps for formation of the above product?

249383_86b5f6d41ac840ee909e2860a32de60f.png
  • Formation of carbocation $$\rightarrow$$ Nucleophilic attack by $$Br^\ominus$$
  • Formation of carbocation $$\rightarrow$$ 1,2 hydride shift $$\rightarrow$$ Nucleophilic attack by $$Br^\ominus$$
  • Formation of carbocation $$\rightarrow$$ 1,2 methyl shift $$\rightarrow$$ Nucleophilic attack by $$Br^\ominus$$
  • None of these
Consider the reaction between $$\displaystyle C_{2}H_{5}O^{\circleddash }$$ and dimethyl sulphate. The leaving group in this reaction is
  • $$\displaystyle MeOSO_{2}O^{\circleddash }$$
  • $$\displaystyle MeO^{\circleddash }$$
  • $$\displaystyle Me^{\circleddash }$$
  • $$\displaystyle MeOSO_{2}^{\circleddash }$$
Solubility of alcohols in water is _______ to that of hydrocarbons of comparable molecular masses.
  • greater than
  • similar
  • lesser than
  • none of these
The IUPAC name of the following compound is:
248722.bmp
  • 1-cyclopentene-4-ol
  • 3-cyclopenten-1-ol
  • 3-hydroxy cyclopentene
  • 4-hydroxy cyclopentene
Lower alcohols are highly soluble in water due to _____.
  • van der Waal's attraction
  • dipole dipole interaction
  • steric hindrance
  • H-bonding
 Phenol on reaction with $$\displaystyle { NH }_{ 3 }$$ gives :-
  • Aniline
  • Nitrobenzene
  • Benzaldehyde
  • Anilinium chloride
The product obtained in the above reaction is:
262921.PNG
  • $$\displaystyle RCH=CHCOOH$$
  • none of these
Carbinol is a trivial name of :-
  • $$\displaystyle { C }_{ 2 }{ H }_{ 5 }OH$$
  • $$\displaystyle { CH }_{ 3 }OH$$
  • $$\displaystyle HCOOH$$
  • $$\displaystyle { CH }_{ 3 }COOH$$
Heating together of sodium ethoxide and ethyl iodide will give:
  • ether
  • ethyl alcohol
  • acetaldehyde
  • acetic acid
The acidity of phenol is due to the _____ of its anion.
  • keto-enol tautomerism
  • electron withdrawing nature
  • hyperconjugation
  • resonance stabilisation
With ethoxyethane which compound is miscible to almost the same extent?
  • Formaldehyde
  • Bhutanone
  • Butan-1-ol
  • Propan-1-ol
Lower alcohols are more soluble in water than higher alcohols.
  • True
  • False
The correct reactivity order of alcohols towards $$H-X$$ will be:


262804.bmp
  • $$\;II>I>III>IV$$
  • $$\;IV>III>II>I$$
  • $$\;II>IV>I>III$$
  • $$\;II>IV>III>I$$
Electrophilic substitution reaction in phenol takes place at:
  • para position
  • meta position
  • ortho position
  • ortho and para position
Which of the following is a primary alcohol ?
  • Butan - 2 - ol
  • 2 - Methylpropan -1- ol
  • 2 - Methylpropan - 2- ol
  • None of the above
The major product obtained on acid - catalysed hydration of 2-phenylpropene is:
  • 2-phenylpropan-2-ol
  • 2-phenylpropan-1-01
  • 3-phenylpropan-2-ol
  • 1-phenylpropan-1-ol
Among ethanol, dimethyl ether, methanol and propanal, the isomers are
  • ethanol, dimethyl ether, methanol and propanal
  • ethanol and methanol
  • ethanol, dimethyl ether, and methanol
  • ethanol and dimethyl ether
The major product of the above reaction is:
295223_6d0aa3256f914da38e4251a6e014d1a1.PNG
Refer the given reactions and answer the following questions:
Identify X, Y and Z respectively:

316120_20c56845e3e745a8941c4b3322ad3dd2.png
  • $$\displaystyle CH_{3}COOH,CH_{2}= CH_{2},CH_{3}COOCH_{3}$$
  • $$\displaystyle CH_{2}= CH_{2},CH_{3}COOH,CH_{3}COOCH_{2}CH_{3}$$
  • $$\displaystyle HCHO,CH_{3}CH_{3},CH_{3}CH_{2}COOH $$
  • $$\displaystyle CH_{3}CH_{3},HCHO,CH_{3}COOH $$
Identify the stereoisomeric pair from the following choices
  • $$CH_3 CH_2 CH_2 OH$$ and $$CH_3 CH_2 OCH_3$$
  • $$CH_3 CH_2 CH_2 Cl$$ and $$CH_3 CHClCH_3$$
Among the four compounds (i) acetone, (ii) propanol, (iiii) methyl acetate and (iv) propionic acid, the two that are isomeric are
  • methyl acetate and acetone
  • methyl acetate and propanol
  • propionic acid and methyl acetate
  • propionic acid and acetone
Which of the following is correct for stability of phenoxide ion?
  • Resonating structure of benzene ring
  • Localization of $$\pi$$-electrons in phenoxide ion
  • Delocalization of $$\pi$$-electrons in phenoxide ion.
  • All of the above
Phenol is more acidic than that of ethanol because:
  • phenoxide ion is bulkier then ethoxide
  • phenoxide ion is stronger base than ethoxide
  • phenoxide ion is stabilised through delocalisation
  • phenoxide ion is less stable than ethoxide
A vicinal diol has two alcoholic groups present :
  • on the same carbon
  • on adjacent carbon atoms
  • anywhere along the carbon chain
  • none of the above
The product formed by decolourization of $$KMn{O}_{4}$$ by ethylene is _________ which is used as ______.
  • ethane, oxidant
  • ethyl alcohol, coolant
  • ethylene glycol, antifreeze
  • ethanol, reductant
Which among the following reactions does not give methyl alcohol?
  • The reaction of ethylene with $${H}_{2}{SO}_{4}$$ at $${80}^{o}C$$
  • The reaction of water gas with hydrogen at high temperature
  • Alkaline hydrolysis of methyl bromide
  • Both $$A$$ and $$B$$
The IUPAC name of $$CH_3\, -\, C(CH_3) (OH) CH_2\, -\, CH(CH_3)\, CH_3$$ is :
  • 2, 4 - Dimethylpentan - 2 - ol
  • 2, 4 - Dimethylpentan - 4 - ol
  • 2, 2 - Dimethylbutane
  • Isopentanol
What are the types of reactions occurring in the formation of X, Y and Z respectively?
316121_58d4ceeb1e10416d9ab171a037052c1c.png
  • Oxidation, Reduction, Substitution
  • Substitution, Esterification, Dehydration
  • Reduction, Substitution, Oxidation
  • Dehydration, Oxidation, Esterification
Alcohols containing only up to ________________ carbon atoms are completely miscible with water.
  • 10
  • 3
  • 8
  • 14
Methanol is now prepared from:
  • water gas
  • sugar through fermentation
  • wood
  • both $$A$$ and $$B$$
The molecular formula of ethanol is :
  • $$(CH_3)_2 CHOH$$
  • $$C_2 H_5 OH$$
  • $$CH_3 OH$$
  • $$CH_3 CH_2 CH_2 OH$$
What is the common name of methyl alcohol?
  • Wine
  • Wood spirit
  • Dilute acid
  • None of the above
Glycol is a:
  • primary alcohol
  • dihydric alcohol
  • secondary alcohol
  • trihydric alcohol
The suffix used in the nomenclature of alcohol is:
  • 'al'
  • 'ol'
  • 'yl'
  • 'one'
Propene on hydration gives
  • propan-1-ol
  • propan-2-ol
  • propanal
  • methoxy ethane
The compound which reacts fastest with Lucas reagent at room temperature, is
  • butan-1-ol
  • butan-2-ol
  • 2-methyl propan-1-ol
  • 2-methyl propan-2-ol
What amount of bromine will be required to convert $$2\ g$$ of phenol into $$2, 4, 6-tribromophenol$$?
  • $$4.00$$
  • $$6.00$$
  • $$10.22$$
  • $$20.44$$
Sodium phenoxide $$\xrightarrow [ pressure ]{ { CO }_{ 2 } }  A \xrightarrow [  ]{ { { H }_{ 3 }O }^{ + } } $$ o-hydroxy benzoic acid
This product can also be obtained by the reaction of which of the following?
  • Phenol + chloroform +alkali
  • Phenol + pyrene + alkali
  • Phenol + acetyl chloride + $$Al{Cl}_{3}$$
  • Phenol + methyl chloride + $$Al{Cl}_{3}$$
Which statement is incorrect?
  • Phenol is a weak acid
  • Phenol is an aromatic compound
  • Phenol liberates $$C{ O }_{ 2 }$$ from $${ Na }_{ 2 }C{ O }_{ 3 }$$ solution
  • Phenol is soluble in $$NaOH$$
The miscibility of ether with _______ resembles those of alcohol of the same molecular mass.
  • methanol
  • water
  • DCM
  • benzene
Identify the major product X obtained in the following reaction.

$$2, 3-\text{dimethyl butan}-2-ol\xrightarrow []{Conc.H_{ 2 }SO_{ 4 }} X$$
The ionization constant of phenol is more than that of ethanol because:
  • phenoxide ion is a stronger base than ethoxide ion.
  • phenoxide ion is stabilized by resonance.
  • ethoxide ion is stabilized by resonance.
  • phenoxide ion is aromatic while ethoxide ion is aliphatic.
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