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Chemistry 2003 WAEC Past Questions

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11
What term is used to describe an oxide whose aqueous solution turns blue litmus red?
  • A. Strong electrolyte
  • B. Acid anhydride
  • C. Amphoteric oxide
  • D. Basic oxide
View Answer & Discuss (1) WAEC 2003
12
The pH of 0.50 mol dm-3 solutions of HCI, H2SO4 and CH3COOH were measured. which of the following statements about the values obtained is correct?
  • A. the pH value was equal to 5 in each case
  • B. the pH values of the HCI and H2SO4 solutions were equal
  • C. their pH values added uo to 14
  • D. the pH value of the CH3COOH was the highest.
View Answer & Discuss (3) WAEC 2003
13
Which of the following processes involves neutralization?
  • A. Hardening of oils
  • B. Souring of milk
  • C. Charring of sugar
  • D. Liming of soil
View Answer & Discuss (3) WAEC 2003
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14
Sea shells contain mainly CaCO 3. Calcium oxide can be prepared from sea shells by
  • A. adding dilute acid
  • B. heating at a high temperature
  • C. reduction with CO
  • D. adding dilute NaOH(aq)
View Answer & Discuss WAEC 2003
15
Which of the following statements about an exothermic reaction is correct?
  • A. the products have less heat content than reactants
  • B. the system absorbs heat from the surrounding
  • C. the activation energy is high
  • D. the enthalpy change is positive
View Answer & Discuss (1) WAEC 2003
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts