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Chemistry 2005 JAMB Past Questions

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11

The enzymes responsible for converting sucrose into two simple isomeric sugars is

  • A. maltase
  • B. amylase
  • C. invertase
  • D. lactase
View Answer & Discuss (9) JAMB 2005
12

The decolourization of purple colour of tetraoxomanganate (VII) ion is a test for

  • A. alkenes
  • B. alkanols
  • C. alkanals
  • D. alkanes
View Answer & Discuss (7) JAMB 2005
13

Which of the following are structural isomers?

  • A. propanoic acid and propan-1, 2-diol
  • B. Propanal and propanone
  • C. Ethanoic acid and propanoic acid
  • D. Ethan-1, 2-diol and ethanoic acid
View Answer & Discuss (12) JAMB 2005
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14

In the purification of impure samples of ethyl ethanoate synthesized by esterification, concentrated sodium trioxocarbonate (IV) solution is used to remove

  • A. water
  • B. basic impurities
  • C. acidic impurities
  • D. ethoxyethane
View Answer & Discuss (4) JAMB 2005
15

How many hydrogen atoms does a single ring cycloalkane have less than the corresponding open-chain alkane?

  • A. Two
  • B. Three
  • C. Four
  • D. One
View Answer & Discuss (4) JAMB 2005
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