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Chemistry 1989 WAEC Past Questions

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11
Which of the following gases will bleach moist litmus paper?
  • A. CI2
  • B. CO2
  • C. SO2
  • D. HCI2
  • E. N2 O
View Answer & Discuss (3) WAEC 1989
12

Given that for the reaction KOH (aq) + HCI(aq) → KCI(aq) + H2O(L) H = - 54 Kj mol-1. What is the quantity of heat involved in the reaction?2NaOH(aq) + H2SO 4(aq) → Na2SO4(aq) + 2H 2O(l)?

  • A. - 108Kj
  • B. -54 kj
  • C. -27 kj
  • D. +27 kj
  • E. +54 kj
View Answer & Discuss (4) WAEC 1989
13
When an element can exist in two or more forms in the same physical state, the element is said to exhibit
  • A. isotopy
  • B. isomerism
  • C. allotropy
  • D. hygroscopy
  • E. sublimation
View Answer & Discuss (1) WAEC 1989
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14
Which of the following carbohydrates does NOT usually occur in the crystalline form?
  • A. Fructose
  • B. Glucose
  • C. Sucrose
  • D. Maltose
  • E. Cellulose
View Answer & Discuss (2) WAEC 1989
15
Copper can best be purified by
  • A. roasting the impure copper in a blast furnace
  • B. heating the oxide with coke
  • C. electrolyzing a copper (ll) salt solution using the impure copper as the anode
  • D. converting the impure copper to a trioxonitrate (V)
  • E. washing the impure copper with sodium hydroxide solution
View Answer & Discuss WAEC 1989
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208