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Chemistry JAMB Past Questions

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701
What is the concentration of H+ ions in moles per dm3 of a sodium of pH 4.398?
  • A. 4.0 χ 10-5
  • B. 0.4 χ 10-5
  • C. 4.0 χ 10-3
  • D. 0.4 χ 10-3
View Answer & Discuss (23) JAMB 1990
702

What volume of 11.0 M hydrochloric acid must be dilute to obtain 1 dm3 of 0.05 M acid?

  • A. 0.05 dm3
  • B. 0.10 dm3
  • C. 0.55 dm3
  • D. 11.0 dm3
View Answer & Discuss (16) JAMB 1990
703
If 10.8 g of silver is deposited in a silver coulometer volume of oxygen liberated is?
  • A. 0.56 dm3
  • B. 5.60 dm3
  • C. 11.20 dm3
  • D. 22.40 dm3
View Answer & Discuss (18) JAMB 1990
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704
0.1 faraday of electricity deposited 2.95 g of nickel during electrolysis of an aqueous solution.
Calculate the number of moles of nickel that will be deposited by 0.4 faraday?

(Ni = 58.7)
  • A. 0.20
  • B. 0.30
  • C. 0.04
  • D. 5.87
View Answer & Discuss (7) JAMB 1990
705
Which of the following can be obtained by fractional distillation?
  • A. Nitrogen from liquid air
  • B. Sodium chloride from sea water
  • C. Iodine from a solution of Iondine in carbon tetrachloride
  • D. Sulphur from a solution of sulphur incarbon disulphide
View Answer & Discuss (2) JAMB 1991
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