JEE Questions for Chemistry Alcohols Phenols And Ethers Quiz 4 - MCQExams.com

Ethylene glycol gives oxalic acid on oxidation with
  • acidified K2Cr2O7
  • acidified KMnO4
  • alkaline KMnO4
  • periodic acid
The correct order of boiling point for primary (1°), secondary (2°) and tertiary (3°) alcohols is
  • 1° > 2° > 3°
  • 3° > 2° > 1°
  • 2° > 1° > 3°
  • 2° > 3° > 1°
The alcohol that produces turbidity immediately with ZnCl2 /conc. HCl at room temperature
  • 1-hydroxy butane
  • 2-hydroxy butane
  • 2-hydroxy-2-methyl propane
  • 1-hydroxy-2-methyl propane
Primary, secondary and tertiary alcohols are distinguished from one another by
  • Ninhydrin test
  • Tollen's reagent
  • Lucas test
  • Wittig reaction
RCH2CH2OH can be converted to RCH2CH2COOH by the following sequence of steps
  • PBr3 , KCN, H3O+
  • PBr3 , KCN, H2/P+
  • KCN, H3O+
  • HCN, PBr3 , H3O+
In Lucas test an alcohol reacts immediately and gives insoluble chloride. The alcohol is
  • CH3OH
  • CH3CH2OH
  • (CH3)2CHOH
  • (CH3)3COH
Which one of the following will most readily be dehydrated in acidic conditions ?

  • Chemistry-Alcohols Phenols and Ethers-53.png
  • 2)
    Chemistry-Alcohols Phenols and Ethers-54.png

  • Chemistry-Alcohols Phenols and Ethers-55.png

  • Chemistry-Alcohols Phenols and Ethers-56.png
The —OH group of an alcohol or the —COOH group of a carboxylic acid can be replaced by —Cl using
  • phosphorus pentachloride
  • hypochlorous acid
  • chlorine
  • hydrochloric acid
During dehydration of alcohols to alkenes by heating with concentrated H2SO4 the initiation step is
  • protonation of alcohol molecule
  • formation of carbocation
  • elimination of water
  • formation of an ester
The dehydration of butan-1-ol gives
  • 1-butene as the main product
  • 2-butene as the main product
  • equal amounts of 1-butene and 2-butene
  • 2-methyl propene
Methanol cannot be dried with anhydrous CaCl2 because
  • CaCl2 dissolves in it
  • it is not good dehydrating agent
  • it forms a solid CaCl2 ∙ 4CH3 OH
  • it reacts with CH3OH
Among the following compounds which can be dehydrated very easily ?

  • Chemistry-Alcohols Phenols and Ethers-60.png
  • 2)
    Chemistry-Alcohols Phenols and Ethers-61.png

  • Chemistry-Alcohols Phenols and Ethers-62.png

  • Chemistry-Alcohols Phenols and Ethers-63.png
Cyclohexanol on reaction with PBr3 in presence of pyridine gives
  • bromocyclohexene
  • bromocyclohexane
  • 1-bromocyclohexanol
  • None of these

Chemistry-Alcohols Phenols and Ethers-64.png

  • Chemistry-Alcohols Phenols and Ethers-65.png
  • 2)
    Chemistry-Alcohols Phenols and Ethers-66.png

  • Chemistry-Alcohols Phenols and Ethers-67.png

  • Chemistry-Alcohols Phenols and Ethers-68.png
An organic compound ' X ' on treatment with pyridinium chlorochromate in dichloromethane gives compound 'Y '. Compound 'Y ' , reacts with I2 and alkali to form triodomethane. The compound 'X ' is
  • C2H5OH
  • CH3CHO
  • CH3COCH3
  • CH3COOH
An unknown compound 'D ' first oxidised to aldehyde and then acetic acid by a dilute solution of K2Cr2O7 and H2SO4 . The compound 'D ' is
  • CH3OH
  • C2H5OH
  • CH3CH2COOH
  • CH3CH2CHO
A fruity smell is obtained by the reaction of ethanol with
  • CH3COCH3
  • PCl5
  • CH3COOH
  • CH3CHO
Pinacol is
  • 3-methylbutan-2-ol
  • 2, 3-dimethyl-2, 3-butanediol
  • 2, 3-dimethyl-2-propanone
  • None of the above
Which of the following will not react with NaOH ?

  • Chemistry-Alcohols Phenols and Ethers-70.png
  • C2H5OH
  • CH3CONH2
  • CH(CN)3
The correct order of ease of dehydration of following is
Chemistry-Alcohols Phenols and Ethers-71.png
  • I > II > III
  • III > II > I
  • I > III > II
  • III > I > II

Chemistry-Alcohols Phenols and Ethers-72.png
  • 1-propanol
  • 2-butanol
  • 2-propanol
  • ethanol

Chemistry-Alcohols Phenols and Ethers-73.png
  • HCHO, HCOONH4
  • HCOOH, HCOONH4
  • HCOOH, HCONH2
  • HCHO, HCONH2
When compound X is oxidised by acidified potassium dichromate, compound Y is formed. Compound Y on reduction with LiAlH4 gives X. X and Y respectively are
  • C2H5OH, CH3COOH
  • CH3COCH3 , CH3COOH
  • C2H5OH, CH3COCH3
  • CH3CHO, CH3COCH3

Chemistry-Alcohols Phenols and Ethers-75.png
  • oxidation, chlorination
  • reduction, chlorination
  • oxidation, addition
  • reduction, substitution
Lucas reagent is
  • conc. HCl and anhydrous ZnCl2
  • conc. HNO3 and hydrous ZnCl2
  • conc. HCl and hydrous ZnCl2
  • conc. HNO3 and anhydrous ZnCl2
In the following reaction, X and Y respectively are
Chemistry-Alcohols Phenols and Ethers-77.png
  • CH3OH, C2H5OH
  • CH3CHO, CH3OH
  • CH3CO2H, C2H5OH
  • C2H4 , CH3CO2H

Chemistry-Alcohols Phenols and Ethers-78.png
  • C4H6O
  • C4H10O
  • C2H4O
  • C2H6
Which of the following compounds is most acidic ?
  • CH4
  • C2H6
  • CH ≡ CH
  • C2H5OH
For the identification of β-naphthol using dye test, it is necessary to use
  • dichloromethane solution of β-naphthol
  • acidic solution of β-naphthol
  • neutral solution of β-naphthol
  • alkaline solution of β-naphthol
Which of the following compounds will give positive iodoform test with I2 and NaOH ?
  • C6 H5 COC6 H5
  • CH3CH2CHO
  • C6H5COCH2CH3

  • Chemistry-Alcohols Phenols and Ethers-81.png
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