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Chemistry 2012 JAMB Past Questions

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16
Potassium trioxochlorate (V)has a solubility of 1.5 mol dm -3 at 45 oC.On cooling this solution to a temperature of 20 oC, the solubility was found to be 0.5 mol dm -3. What mass of KCIO 3 was crystalized out?
[K = 39, Cl = 35.5 O =16]
  • A. 1.00g
  • B. 10.00g
  • C. 12.25g
  • D. 122.50g
View Answer & Discuss (5) JAMB 2012
17

Which of the following pollutants is associated with brain damage?

  • A. Carbon (ll) oxide
  • B. Radioactive fallout
  • C. Biodegradable waste
  • D. Sulphus (lV) oxide
View Answer & Discuss (12) JAMB 2012
18

Which of the following will produce a solution with pH less than 7 at equivalent point?

  • A. HNO 3 +NaOH
  • B. H 2SO 4 + KOH
  • C. HCL +Mg (OH) 2
  • D. HNO 3 + KOH
View Answer & Discuss (2) JAMB 2012
WAEC offline past questions - with all answers and explanations in one app - Download for free
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19

The number of hydroxonium ions produced by one molecule of an acid in aqueous solution is its

  • A. basicity
  • B. acid strength
  • C. pH
  • D. concentration
View Answer & Discuss (12) JAMB 2012
20
During a titration experiment, 0.05 moles of carbon (lV) oxide is liberated. What is the volume of gas liberated?
  • A. 22.40 dm 3
  • B. 11.20 dm 3
  • C. 2.24 dm 3
  • D. 1.12 dm 3
View Answer & Discuss (5) JAMB 2012
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208