12th Class Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank

done MCQs - Alcohols, Phenols and Ethers Total Questions - 15

• question_answer1)
  Alcohols have higher boiling point than parent hydrocarbons because of
  A)
  higher molecular mass done clear
  B)
  presence of hydrogen bonding done clear
  C)
  presence of carbon chain done clear
  D)
  None of the above done clear
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• question_answer2)

  \[{{C}_{6}}{{H}_{5}}CH=CHCHO\xrightarrow{x}{{C}_{6}}{{H}_{5}}CH=CHC{{H}_{2}}OH\]

  In the above sequence X can be

  A)
  \[{{K}_{2}}C{{r}_{2}}{{O}_{5}}/{{H}^{+}}\] done clear
  B)
  \[NaB{{H}_{4}}\] done clear
  C)
  \[{{N}_{2}}/Ni\] done clear
  D)
  Both (b) and (c) done clear
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• question_answer3)
  Which of the following is a tertiary alcohol?
  A)
       done clear
  B)
  done clear
  C)
  \[C{{H}_{3}}\_\_C{{H}_{2}}\_\_OH\] done clear
  D)
  done clear
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• question_answer4)
  Which enzyme converts glucose and fructose both into ethanol?
  A)
  Maltase done clear
  B)
  Diastase done clear
  C)
  Invertase done clear
  D)
  Zymase done clear
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• question_answer5)
  The reagent which easily reacts with ethanol and propanol is
  A)
  Grignard reagent done clear
  B)
  Fehling reagent done clear
  C)
  aqua-regia done clear
  D)
  Tollen's reagent done clear
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• question_answer6)

  \[A\xleftarrow[\Delta ]{Cu}C{{H}_{3}}C{{H}_{2}}OH\xrightarrow[\Delta ]{A{{l}_{2}}{{O}_{2}}}B\]

  A and B respectively are

  A)
  alkene, alkyne done clear
  B)
  alkanal, alkene done clear
  C)
  alkyne, alkanal done clear
  D)
  alkene, alkanal done clear
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• question_answer7)

  The order of reactivity of the following alcohols towards cone. HCl is

  A)
  \[IV>III>II>I\] done clear
  B)
  \[I>II>III>IV\] done clear
  C)
  \[IV>III>I>II\] done clear
  D)
  \[I>III>II>IV\] done clear
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• question_answer8)
  1-propanal and 2-propanal can differentiated by
  A)
  oxidation with acidic \[{{K}_{2}}C{{r}_{2}}O\] followed by reaction with Fehling solution done clear
  B)
  oxidation with \[KMn{{O}_{4}}\] followed by reaction with Fehling solution done clear
  C)
  oxidation with cone. \[{{H}_{2}}S{{O}_{4}}\] followed by reaction with Fehling solution done clear
  D)
  oxidation by heating with copper followed by reaction with Fehling solution done clear
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• question_answer9)

  Which of the following in correct regarding the change in compound given below?

  A)
  Former is more stable then latter due to more resonance done clear
  B)
  Former is enol form, latter is keto form done clear
  C)
  Two compounds exhibits keto-enol isomerism done clear
  D)
  All of the above done clear
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• question_answer10)

  Identify the reagent(s) needed to carry out the following reaction.

  A)
  \[LiAl{{H}_{4}}\] done clear
  B)
  NaOH done clear
  C)
  \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}},{{H}_{2}}S{{O}_{4}}/{{H}_{2}}O\] done clear
  D)
  Na done clear
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• question_answer11)

  In the following compound given below the correct order of decreasing acidic strength is

  A)
  \[IV>III>I>II\] done clear
  B)
  \[II>I>III>IV\] done clear
  C)
  \[I>IV>III>II\] done clear
  D)
  \[III>IV>I>III\] done clear
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• question_answer12)
  A compound that easily undergoes bromination is
  A)
  benzene done clear
  B)
  toluene done clear
  C)
  phenol done clear
  D)
  benzoic acid done clear
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• question_answer13)
  The reagent used for dehydration of an alcohol is
  A)
  phosphorus pentachloride done clear
  B)
  aluminium oxide done clear
  C)
  calcium chloride done clear
  D)
  sodium chloride done clear
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• question_answer14)

  Complete the analogy regarding type of reaction.

  Williamson ether synthesis : A : Aryl ether : B

  A)
  A : Nucleophilic substitution, B : Electrophilic substitution done clear
  B)
  A : Electrophilic substitution, B : Electrophilic substitution done clear
  C)
  A : Nucleophilic addition, B : Nucleophilic substitution done clear
  D)
  A : Electrophilic substitution, B : Nucleophilic addition done clear
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• question_answer15)

  Complete the reaction by identifying

  A)
  \[C{{H}_{2}}=CH\_\_C{{H}_{2}}OH\] done clear
  B)
  done clear
  C)
  \[C{{H}_{3}}COC{{H}_{2}}C{{H}_{3}}\] done clear
  D)
  \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}OH\] done clear
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