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Monday, 15 June 2026
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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 1371:
When a compound X is heated with concentrated tetraoxosulphate(VI)acid, it produces an alkene. X ia an
  • A Alkane
  • B Alkanol
  • C Alkanoate
  • D Alkyne
View Answer & Explanation
Question 1372:
Ripening of fruits is hastened by using
  • A Ethanol
  • B Ethane
  • C Ethene
  • D Ethyne
View Answer & Explanation
Question 1373:
The compound that makes palm wine taste sour after exposure to the air for few days is
  • A Ethanol
  • B Ethanoic acid
  • C Methanol
  • D Methanoic acid
View Answer & Explanation
Question 1374:
Which of the following compounds is/are secondary alkanols?
i) CH3CH(CH3)CH3OH
ii) CH3CH2CH(OH)CH3
iii) CH3C(OH)(CH3)CH3
  • A I only
  • B II only
  • C I and III only
  • D II and III only
View Answer & Explanation
Question 1375:
Consider the following reaction equation
C2H4(g) + 3O2(g) \(\to\) 2CO2(g) + 2H2O(l).
The volume of oxygen at s.t.p that will be required to burn 14g of ethene is
[C2H4 = 28; Molar volume of gas at s.t.p = 22.4dm3
  • A 64.2dm3
  • B 33.6dm3
  • C 11.2dm3
  • D 3.73dm3
View Answer & Explanation