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Chemistry 1993 WAEC Past Questions

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21
Which of the following will not affect the degree of hardness in a sample of temporarily hard water?
  • A. Addition of washing soda
  • B. Adding of soap
  • C. Treatment with carbon exchange resin
  • D. Filtration
  • E. Distillation
View Answer & Discuss WAEC 1993
22
Examples of polymers include the following except
  • A. starch
  • B. nylon
  • C. wool
  • D. perspex
  • E. glass
View Answer & Discuss WAEC 1993
23
When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is
  • A. Y2O
  • B. YNO2
  • C. Y2O3
  • D. Y (NO2)2
  • E. YO2
View Answer & Discuss (1) WAEC 1993
WAEC offline past questions - with all answers and explanations in one app - Download for free
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
24
Which of the following compounds of tin is a strong reducing agent?
  • A. SnCI2
  • B. SnCI4
  • C. SnO2
  • D. SnH4
  • E. Sn(OH)2
View Answer & Discuss (2) WAEC 1993
25
In which of the following pairs are both substances deliquescent?
  • A. CaCI2 and H2SO4
  • B. NaOH and MgSO4 7H2O
  • C. CaCI2 and NaOH
  • D. CUO and NaCI
  • E. CaCO3 and MgCI2
View Answer & Discuss WAEC 1993
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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
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