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1851

What volume of distilled water should be added to 400cm3 of 2.0 mole dm-3 \(H_{2}SO_{4}\) to obtain 0.20 mole dm-3 of solution>

  • A. 600cm-3
  • B. 800cm-3
  • C. 1,000cm-3
  • D. 3,600cm-3
  • E. 4,000cm-3
View Answer & Discuss (8) WAEC 1993
1852
Which of the following indicates the correct increasing order of oxidizing power of the halogens?
  • A. F < CI < Br < l
  • B. l < Br < CI < F
  • C. I < CI < Br < F
  • D. Br < I < CI < F
  • E. CI < F < I < Br
View Answer & Discuss (1) WAEC 1993
1853
Which of the following substances is a peroxide?
  • A. Na2O2
  • B. CuO
  • C. PbO4
  • D. Fe2O
  • E. AI2O
View Answer & Discuss (1) WAEC 1993
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1854
The component of air that removed when air is bubbled into alkaline pyrogallol solution is
  • A. carbon(lV) oxide
  • B. oxgyen
  • C. water vapour
  • D. nitrogen
  • E. helium
View Answer & Discuss WAEC 1993
1855
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
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