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Chemistry WAEC Past Questions

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1011
Zinc oxide is said to be amphoteric because it
  • A. forms an acid salt
  • B. is an insoluble base
  • C. forms a double salt
  • D. reacts with a base or an acid
View Answer & Discuss WAEC 2014
1012
Which of the following substances with the corresponding pH value is an alkali?
Substance pH
  • A. Lime 2.4
  • B. Banana 4.6
  • C. Distilled water 7.0
  • D. Milk of magnesia 10.5
View Answer & Discuss (3) WAEC 2014
1013
The gases produced when Cu(NO3)2(s) was heated are
  • A. NO and NO2
  • B. O2 and NO
  • C. NO2 and N2O4
  • D. O2 and NO2
View Answer & Discuss (9) WAEC 2014
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1014
Which of the following salts on hydrolysis would give an alkaline solution?
  • A. NH4CI(s)
  • B. AICI3(s)
  • C. CH3COONa(s)
  • D. NH4NO3(s)
View Answer & Discuss (2) WAEC 2014
1015
Consider the reaction represented by the following equation: Na2CO3(aq) + 2HCl(aq) \(\longrightarrow\) 2NaCl(aq) + H2O(l) + CO2(g) . What volume of 0.02 mol dm-3 Na2CO3(aq) would be required to completely neutralize 40 cm3 of 0.10 mol dm-3 HCl(aq)?
  • A. 200 cm3
  • B. 100 cm3
  • C. 40 cm3
  • D. 20 cm3
View Answer & Discuss (8) WAEC 2014
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