IBSL Chemistry Topic 10 Organic Chemistry Multiple Choice Questions

20 Questions | Total Attempts: 915

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Questions and Answers
  • 1. 
    Which of the following is true about alkane? I. they form an homologous series with the general formula CnH2n+2 II. They all have identical physical properties III. They all have similar chemical properties
    • A. 

      I, II and III

    • B. 

      I and III only

    • C. 

      II and III only

    • D. 

      III only

  • 2. 
    Which of the following two compounds both belong to the same homologous series?
    • A. 

      CH3COOH and HCOOCH3

    • B. 

      CH3OH and C2H5OH

    • C. 

      C2H4 and C2H6

    • D. 

      C2H5Cl and C2H4Cl2

  • 3. 
    How many different isomers of C5H12 exist?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 4. 
    Gave the name for
    • A. 

      2,2-dimethylbutane

    • B. 

      2-methylpentane

    • C. 

      Hexane

    • D. 

      2-methyl-2ethylpropane

  • 5. 
    Which statement is correct about the reaction between methane and chlorine?
    • A. 

      It involves heterolytic fission and Cl- ions

    • B. 

      It involves heterolytic fission and Cl. radicals

    • C. 

      It involves homolytic fission and Cl- ions

    • D. 

      It involves homolytic fission and Cl. radicals

  • 6. 
    Which compound is an ester?
    • A. 

      CH3COOH

    • B. 

      C2H5CHO

    • C. 

      CH3OC2H5

    • D. 

      HCOOCH3

  • 7. 
    When ethanol is partially oxidized by an acidified solution of potassium dichromate (VI), the product that can be obtained by distillation as soon as it is formed is:
    • A. 

      Ethanal

    • B. 

      Ethanoic acid

    • C. 

      Ethene

    • D. 

      Ethane 1,2 diol

  • 8. 
    Which formula is that of the secondary halogenoalkane?
    • A. 

      CH3CH2CH2CH2Br

    • B. 

      (CH3)2CHCH2Br

    • C. 

      CH3CHBrCH2CH3

    • D. 

      (CH3)2CBr

  • 9. 
    Which compound is converted to butanal by acidified potassium dichromate (VI) solution?
    • A. 

      Butan-1-ol

    • B. 

      Butan-2-ol

    • C. 

      Butanone

    • D. 

      Butanoic acid

  • 10. 
    Which reaction(s) involve(s) the formation of a positive ion? I. CH3CH2CH2Br + OH- II. (CH3)3Br + OH-
    • A. 

      I only

    • B. 

      Both I and II

    • C. 

      II only

    • D. 

      Neither I nor II

  • 11. 
    Which statement about neighbouring members of all homologous series is correct?
    • A. 

      They all have the same empirical formula

    • B. 

      They differ by CH2 group

    • C. 

      They possess different functional groups

    • D. 

      They differ in their degree of unsaturation

  • 12. 
    Which compound is a member of the same homologous series as 1-chloropropane?
    • A. 

      1-chloropropene

    • B. 

      1-chlorobutane

    • C. 

      1-bromopropane

    • D. 

      1,1-dichloropropane

  • 13. 
    Which type of compound must contain a minimum of three carbon atoms?
    • A. 

      An aldehyde

    • B. 

      A carboxylic acid

    • C. 

      An ester

    • D. 

      A ketone

  • 14. 
    What is the IUPAC name for CH3CH2CH(CH3)2?
    • A. 

      1,1-dimenthylpropane

    • B. 

      2-methylbutane

    • C. 

      Isopentane

    • D. 

      Ethyldimethylmethane

  • 15. 
    How many structural isomers are possible with the molecular formula C6H14?
    • A. 

      4

    • B. 

      5

    • C. 

      6

    • D. 

      7

  • 16. 
    Which compound is a member of the aldehyde homologous series?
    • A. 

      CH3COCH3

    • B. 

      CH3CH2CH2OH

    • C. 

      CH3CH2COOH

    • D. 

      CH3CH2CHO

  • 17. 
    Which formulas represent butane or its isomer? I. CH3(CH2)2CH3 II. CH3CH(CH3)CH3 III. (CH3)3CH
    • A. 

      I and II only

    • B. 

      I and III only

    • C. 

      II and III only

    • D. 

      I, II and III

  • 18. 
    Which substance(s) could be formed during the incomplete combustion of a hydrocarbon? I. carbon II. hydrogen III. carbon monoxide
    • A. 

      I only

    • B. 

      I and II only

    • C. 

      I and III only

    • D. 

      II and III only

  • 19. 
    What product results from the reaction of CH2=CH2 with Br2?
    • A. 

      CHBrCHBr

    • B. 

      CH2CHBr

    • C. 

      CH3CH2Br

    • D. 

      CH2BrCH2Br

  • 20. 
    What is the final product formed when CH3CH2OH is refluxed with acidified potassiu dichromate(VI)?
    • A. 

      CH3CHO

    • B. 

      CH2=CH2

    • C. 

      CH3COOH

    • D. 

      HCOOCH3

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