CBSE Questions for Class 12 Engineering Chemistry Alcohols,Phenols And Ethers Quiz 2 - MCQExams.com

Which one of the following compounds has the most acidic nature?

The major product obtained in the reaction $$C{H_3}C{H_2}C \equiv CH\xrightarrow[{{H_2}O}]{{H{g^{ 2  + }},{H_3}{O^ + }}}$$ is:
  • $$CH_3CH_2CH_2CH(OH)_2$$
  • $$CH_3CH_2CH = CHOH$$
  • $$CH_3CH_2CH_2CHO$$
  • $$CH_3CH_2COCH_3$$
Which of the following is used as freezing mixture?
  • Mixture of ether and liquid $$CO_{2}$$
  • Mixture of ether and ethyl alcohol
  • Mixture of ether and dry ice
  • Mixture of ethyl alcohol and dry ice
Alcohols containing only up to ___________ carbon atoms are completely miscible with water.
  • three
  • four
  • five
  • two
The IUPAC name for $$CH_3CH(OH)CH_2C(CH_3)_2OH$$ is:
  • 1, 1-dimethyl-1,3-butanediol
  • 2-methyl-2,4 pentanediol
  • 4-methyl-2 4-pentanediol
  • 1,3,3- trimethyl 1-1,3-propanediol
The IUPAC name of $$CH_{3} - C(CH_{3}) (OH) CH_{2} - CH (CH_{3})_2$$ is:
  • 2,4-Dimethylpentan-2-ol
  • 2,4-dimethylpentan-4-ol
  • 2,2-dimethylbutane
  • 2,4,4-trimethylbutan-2-ol
Identify the final product in the following sequence of reactions.

74068.jpg
  • $$CH_3CH(CH_{(c)})COOH$$
  • $$CH_3CH_2CH_2CH_2OH$$
  • $$CH_3CH_2CH_2COOH$$
  • $$CH_3CH_2COOH
    $$
Trivial name of methanol is _________ .
  • wood spirit
  • methyl alcohol
  • wood alcohol
  • all of the above
__________ is prepared on a large scale from water gas.
  • Methanol
  • Ethanol
  • Methane
  • Ethane
What is the IUPAC Name of t-butyl alcohol?
  • Butan-2-ol
  • 2-Methyl-propan-2-ol
  • Butan-1-ol
  • Propan-2-ol
Identify E :


76678.jpg
IUPAC name of the compound $$CH_3-CH(CH_2CH_3)-CH_2-CH(OH)-CH_3$$ is:
  • 4-Ethyl-2-pentanol
  • 4-Methyl-2-hexanol
  • 2-Ethyl-2-pentanol
  • 3-Ethyl-2-hexanol
The name of the compound :
107760.jpg
  • Pentan-1-ol
  • Pentan-2-ol
  • Pentan-4-ol
  • None of these
On treatment with dilute $$H_{2}SO_{4}$$, ethene forms ethanol.
Is the above statement true?
  • True
  • False
Which of the following is used in the manufacture of ethanol?
  • $$C_{2} H_{6}$$
  • $$C_{2}H_{2}$$
  • $$CH_{4}$$
  • $$C_{2}H_{4}$$
Which of the following products are formed when ethyl alcohol is heated with $$H_{2}SO_{4}$$?
  • Ethene
  • Diethyl ether
  • Dimethyl ether
  • Ethane
Decolorization of $$KMnO_4$$ solution takes place when it reacts with ethene. The final product of this reaction which is used as anti-freeze is:
  • ethylene glycol
  • propylene glycol
  • ethanol
  • propanol
$$CH_3CH = CHCH_3 \xrightarrow [(i)A]{(ii) B} CH_3-\underset{OH}{\underset{|}{C}H} - \overset{OH}{\overset{|}{C}H} - CH_3$$, $$A\& B$$ are 
How would you get racemic mixture of 1, 2-butane diol from cis 2- butene?
  • $$\displaystyle A=KMnO_{4}/OH^{-}, B=H_{2}O$$
  • $$\displaystyle A=CF_{3}/CO_{3}H, B=H_{2}O$$
  • $$\displaystyle A=OsO_{4}/OH^{-}, B=H_{2}O$$
  • $$\displaystyle A=O_{3}/H_{2}O, B=Ph_{3}P$$
By treating alkylchloride with aq. $$KOH$$ produce:
  • alcohol
  • $$KCl$$
  • alkane
  • Both $$A$$ and $$B$$
In the production of alcohol _____  are used.
  • alkene
  • alkynes
  • alkanes
  • both (a) and (b) above

IUPAC name is 3-phenylpropan-1-ol.

128754_9995b3f47d3d45419f4aaf749ff3e214.png
  • True
  • False

Dehydration of alcohols take place more rapidly with $$\displaystyle POCl_{3}$$ than with $$\displaystyle H_{2}SO_{4}.$$ 

Select the correct statements(s) about the above dehydration reaction :

137125_be0bff91bbb54e32900bbcf85fceef14.png
  • It does not involve carbocation.
  • It involves $$\displaystyle R-OPOCl_{2}$$ with $$\displaystyle -OPOCl_{2}$$ as a better leaving group.
  • It involves $$E2$$ mechanism as pyridine base abstracts proton from the adjacent carbon as the same time at which $$\displaystyle -OPOCl_{2}$$ is leaving.
  • It is $$E1$$ reaction without formation of carbocation.
Ethanol on reaction with acetic anhydride gives:
  • acetic ester
  • formic ester
  • ethanoic acid
  • ethyl acetate and ethanoic acid
IUPAC name is 1-phenyl propan-3-ol.
Is the above statement correct?

128751.JPG
  • True
  • False
Compound which gives alcohol on reduction is/are:
What is IUPAC name of the following compound? 
C$$H_3$$ - C$$H_2$$ - C$$H_2$$ - OH
  • Propane-1-ol
  • Propane-2-ol
  • Ethane-1-ol
  • Ethane-2-ol
$$\displaystyle EtO-CH_2-C_6H_5+HI\rightarrow D$$
Name the product D in the given reaction.
  • Diethyl ether
  • Benzyl iodide
  • ethane
  • none of these
Which of the following has a higher boiling point?
  • Butanol
  • Butanal
  • Both of them have similar boiling point
  • Cannot say anything 
The following structures represents cyclopentyl methyl carbinol.

State whether the given statement is true or false:

244269.gif
  • True
  • False
Number of 1,2-hydride shifts occur while converting $$1-$$methylcyclohexanol to $$1-$$bromo$$-1-$$methylcyclohexane is:
  • 1
  • 0
  • 2
  • 3
Among the three isomers of the nitrophenol, the one that is least soluble in water is:
  • m-nitrophenol
  • o-nitrophenol
  • p-nitrophenol
  • none of these
Acid-catalysed dehydration of which of following compounds is fastest?
  • t-Butanol
  • sec-Butanol
  • n-Butanol
  • All dehydrate at similar rate
The $$-OH$$ group in alcohols can be replaced by:
  • $$\displaystyle SOCl_{2}$$
  • $$\displaystyle Cl_{2}$$
  • $$\displaystyle PCl_{5}$$
  • $$\displaystyle P+Cl_{2}$$
$$CH_3-\underset{CH_3}{\underset{|}{C}H}-\underset{OH}{\underset{|}{C}H}-\underset{CH_3}{\underset{|}{\overset{CH_3\!\!\!\!\!}{\overset{|}{C}}}-}CH_3$$

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
 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
Acid-catalysed dehydration of which of following compounds is slowest?
  • t-Butanol
  • sec-Butanol
  • n-Butanol
  • All of them dehydrate at similar rate
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 statements is/are correct?
  • PhOH has a higher boiling point than PhSH (benzenethiol)
  • p-Hydroquinone has a higher melting point than catechol.
  • o-Nitrophenol has a lower boiling point than m-and p-isomers.
  • o-Hydroxybenzaldehyde is more water solube than m-and p-isomers
$$CH_3-\underset{OH}{\underset{|}{C}H}-\underset{OH}{\underset{|}{C}H}-CH_3$$

IUPAC name of the given compound is :
  • Butane-2,3-diol
  • 1-Methyl-propane-1,2-diol
  • Both (A) and (B)
  • None of these
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
In the synthesis of n-alkyl tert-alkyl ether by Williamson's method the reactants used are:
  • $$\displaystyle 3^{\circ}RX$$ and $$1^{\circ} RONa $$
  • $$\displaystyle 1^{\circ}RX$$ and $$3^{\circ} RONa$$ 
  • $$\displaystyle 3^{\circ}RX$$ and $$3^{\circ} RONa $$
  • $$\displaystyle 1^{\circ}RX$$ and $$1^{\circ} RONa $$
The IUPAC name of the following compound is:

248721.bmp
  • 3-cyclohexylpentan-3-ol
  • 3-cyclohexyl,3-hydroxypentane
  • 3-hydroxypentyl cyclohexane
  • none of the above
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
The IUPAC name of the following compound is:
248706_4531c974e62447e4a3773b218366cb0e.png
  • 1-Phenylpropan-2-ol
  • 3-Phenylpropan-2-ol
  • 2-Hydroxypropylbenzene
  • None of these
$$CH_3 - \underset{OH}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - CH_2 - CH_3$$
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
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
The product obtained in the above reaction is:
262921.PNG
  • $$\displaystyle RCH=CHCOOH$$
  • none of these
Which of the following groups will increase the acidity of phenol?
  • $$-N{O}_{2}$$
  • $$-CN$$
  • $$-X$$ (halogen)
  • None of these
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 12 Engineering Chemistry Quiz Questions and Answers