CBSE Questions for Class 12 Medical Chemistry Alcohols, Phenols And Ethers Quiz 3 - MCQExams.com

$$CH_3-CH_2-\overset{OH}{\overset{|}{C}H}-CH_2-CH_2-\underset{CH_3}{\underset{|}{C}H}-CH_2-CH_3$$
The IUPAC name of the compound is:
  • 6-methyl-3-hexanol
  • 6-Methyl-3-octanol
  • 1-methyl-4-hexanol
  • 4-methyl-1-octanol
Which of the following is a tertiary alcohol?
  • $$(CH_{3})_{2}CHCH_{2}OH$$
  • $$CH_{3}CH_{2}CH_{2}CH_{2}OH$$
  • $$CH_{3}CH_{2}CH_{2}OH$$
  • $$(CH_{3})_{3}COH$$
An example for a polyhydric alcohol is:
  • methyl alcohol
  • neopentyl alcohol
  • sec butyl alcohol
  • mannitol
The IUPAC name is:

25355_2e1da9b57e0d472b8e323344bde05584.png
  • 2, 4 -dimethyl  pentan-2-ol
  • 2, 4 - dimethyl pentan-4-ol
  • 2, 2 - dimethyl butan-2-ol
  • butan-2-ol
The IUPAC name of $$(CH_{3})_{2}CHCH_{2}CH_{2}OH$$ is:
  • 3-Methyl butan-1-ol
  • 2-methyl pentan-1-ol
  • 3-ethyl pentan-1-ol
  • 2-ethyl butan-1-ol
IUPAC name of the following compound is:

$$CH_{3}-CH(C_{2}H_{5})-CH_{2}-CH(OH)-CH_{3}$$ 
  • 4-Methyl -2- hexanol
  • 4-ethyl -2- pentanol
  • 2-ethyl -2- pentanol
  • 3-methylhexanol
The gas liberated during fermentation is:
  • alcoholic vapours
  • $$H_2$$
  • $$CO$$
  • $$CO_{2}$$
Which of the following soluble in water?
  • $$CH_{3}OH$$
  • $$CHCl_{3}$$
  • $$CCl_{4}$$
  • $$CS_{2}$$
Enzymes involved used in the fermentation of cane sugar to alcohol?
  • Diastase, invertase
  • Invertase, zymase
  • Diastase, zymase
  • Maltase, zymase
$$C_{2}H_{5}OH\rightarrow C_{2}H_{5}Br$$

In this conversion, the reagent is:
  • $$HBr$$
  • $$Br_{2} + CCl_{4}$$
  • $$Br_{2}$$ water
  • $$KBr$$
Which group can be completely displaced by a halogen group?
  • Hydroxyl group(OH)
  • Aldehyde $$(-CHO)$$ group
  • Nitro $$(-NO_{2})$$ group
  • Keto $$(C=O)$$ group
The compound in which hydrogen bonding is not possible is:
  • $$CH_{3}OCH_{3}$$
  • $$CH_{3}CH_{2}OH$$
  • $$H_{2}O$$
  • $$CH_{3}COOH$$
Which alcohol is prepared from water gas?
  • $$C_{2}H_{5}OH$$
  • $$CH_{3}CH_{2}CH_{2}OH$$
  • $$CH_{3}OH$$
  • $$C_{6}H_{5}CH_{2}OH$$
Which one of the following reagents can not cause $$C- O$$ bond fission in alcohols?
  • $$HCl /ZnCl_{2}$$
  • $$PCl_{5}$$
  • $$SOCl_{2}$$
  • Sodium
Hydrolysis of an ester gives acid A and alcohol B. The acid reduces Fehlings solution. Oxidation of alcohol B gives acid A. The ester is:
  • Mehthyl formate
  • Ethyl formate
  • Methyl acetate
  • Ethyl acetate
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
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
On reacting with grignard reagent acetone gives?
  • $$1^0 alcohol$$
  • $$2^0 alcohol$$
  • $$3^0 alcohol$$
  • None of these
Phenol reacts with bromine water in carbon disulphate at low temperature to give
  • o-bromophenol
  • o- and p-bromophenols
  • p-bromophenol
  • 2, 4, 6-tribromophenol
What is the IUPAC Name of t-butyl alcohol?
  • Butan-2-ol
  • 2-Methyl-propan-2-ol
  • Butan-1-ol
  • Propan-2-ol

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:
  • $$CH_3CH_2CH_2CH(OH)_2$$
  • $$CH_3CH_2CH = CHOH$$
  • $$CH_3CH_2CH_2CHO$$
  • $$CH_3CH_2COCH_3$$
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?
  • $$C_{2} H_{6}$$
  • $$C_{2}H_{2}$$
  • $$CH_{4}$$
  • $$C_{2}H_{4}$$
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
  • Both assertion and reason are CORRECT and reason is the CORRECT explanation of the assertion.
  • Both assertion and reason are CORRECT, but reason is NOT THE CORRECT explanation of the assertion.
  • Assertion is CORRECT, but reason is INCORRECT.
  • Assertion is INCORRECT, but reason is CORRECT.
Alcohols containing only up to ___________ carbon atoms are completely miscible with water.
  • three
  • four
  • five
  • two
By treating alkylchloride with aq. $$KOH$$ produce:
  • alcohol
  • $$KCl$$
  • alkane
  • Both $$A$$ and $$B$$
__________ is prepared on a large scale from water gas.
  • Methanol
  • Ethanol
  • Methane
  • Ethane
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
$$CH_3CH = CHCH_3 \xrightarrow [(i)A]{(ii) B} CH_3-\underset{OH}{\underset{|}{C}H} - \overset{OH}{\overset{|}{C}H} - CH_3$$, $$A\& B$$ are 
How would you get racemic mixture of 1, 2-butane diol from cis 2- butene?
  • $$\displaystyle A=KMnO_{4}/OH^{-}, B=H_{2}O$$
  • $$\displaystyle A=CF_{3}/CO_{3}H, B=H_{2}O$$
  • $$\displaystyle A=OsO_{4}/OH^{-}, B=H_{2}O$$
  • $$\displaystyle A=O_{3}/H_{2}O, B=Ph_{3}P$$

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
The decreasing basic character of the following is:
(I) $$Ph{O}^{\ominus}$$              (II) $$C{H}_{3}{S}^{\ominus}$$                   (III) $$ \overset { \ominus  }{ O }H   $$              (IV) $$Me{O}^{\ominus}$$
  • $$I > II > III > IV$$
  • $$III > IV > II > I$$
  • $$IV > III > II > I$$
  • $$I > II > IV > III$$
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
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
The IUPAC name of the following compound is:
248706_4531c974e62447e4a3773b218366cb0e.png
  • 1-Phenylpropan-2-ol
  • 3-Phenylpropan-2-ol
  • 2-Hydroxypropylbenzene
  • None of these
The $$-OH$$ group in alcohols can be replaced by:
  • $$\displaystyle SOCl_{2}$$
  • $$\displaystyle Cl_{2}$$
  • $$\displaystyle PCl_{5}$$
  • $$\displaystyle P+Cl_{2}$$
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