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3871
Which of the following processes removes carbon (IV) oxide from the atmosphere?
  • A. Burning fuels
  • B. Putrefaction
  • C. Photosynthesis
  • D. Respiration in plants
View Answer & Discuss (1) WAEC 2015
3872
Which of the following characteristic features is not associated with monocotyledonous plants?
  • A. Well differentiated sepals and petals
  • B. Presence of fibrous root system
  • C. Presence of narrow leaves
  • D. Flora parts are in multiples of three
View Answer & Discuss WAEC 2015
3873
The main difference between a seed and a fruit is that a fruit
  • A. is large while a seed is small
  • B. has two scars while a seed is has one
  • C. is pigmented while a seed is not
  • D. can be dispersed by animals while a seed cannot
View Answer & Discuss (6) WAEC 2015
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3874
A student used the following steps in testing for a non-reducing sugar.

I. added Benedict's solution to the sugar solution

ll. added dilute hydrochloric acid to the sugar and boiled it;

lll. added sodium hydroxide solution to the solution in ll. and boiled;

IV. added Benedict's solution to the cooled solution in lll.

Use this information above to answer the question.

Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To
  • A. oxidize the sugar solution
  • B. hydrolyse the sugar solution
  • C. dry the sugar solution
  • D. increase the volume of the sugar solution
View Answer & Discuss (1) WAEC 2015
3875

A student used the following steps in testing for a non-reducing sugar.

I. added Benedict's solution to the sugar solution

ll. added dilute hydrochloric acid to the sugar and boiled it;

lll. added sodium hydroxide solution to the solution in ll. and boiled;

IV. added Benedict's solution to the cooled solution in lll.

Use this information above to answer the question.

What is the importance of step ll in the testing process? To

  • A. neutralize the sugar solution
  • B. soften the sugar solution
  • C. change the colour of the sugar solution
  • D. increase the acid content of the sugar solution
View Answer & Discuss (4) WAEC 2015
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