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Chemistry WAEC Past Questions

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1141
Which of the following oxides is ionic?
  • A. P4O10
  • B. MgO
  • C. Al2O3
  • D. SO2
View Answer & Discuss (6) WAEC 2015
1142
Which of the following substances when boiled with aqueous solution of sodium hydroxide would be hydrolyzed?

i. Protein ii. Fat iii. Polythene
  • A. i
  • B. ii
  • C. i and ii
  • D. ii and iii
View Answer & Discuss (2) WAEC 2015
1143
Which of the following trioxonitrate(V) salts would decompose on heating to form a metal?
  • A. Cu(NO3)2
  • B. AgNO3
  • C. Pb(NO3)2
  • D. KNO3
View Answer & Discuss (3) WAEC 2015
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1144

Consider the following reaction equation:
C2H4(g) + 3O2(g) \(\to\) 2CO2(g) + 2H2O(g)

The volume of CO2(g) produced at s.t.p when 0.05 moles of C2H4(g) was burnt in O2(g) is
[Molar Volume of gas = 22.4dm3

  • A. 1.12dm3
  • B. 2.24dm3
  • C. 3.72dm3
  • D. 4.48dm3
View Answer & Discuss (4) WAEC 2015
1145
The number of oxygen molecules present in 16.0g of the gas is ______?
[Avogadro's number = 6.02 x 1023]
  • A. 6.02 x 1022
  • B. 6.02 x 1023
  • C. 3.01 x 1023
  • D. 1.51 x 1023
View Answer & Discuss WAEC 2015
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