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Chemistry JAMB Past Questions

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566

Substance employed as drying agents are usually?

  • A. amphoteric
  • B. hygroscopic
  • C. efflorescent
  • D. acidic
View Answer & Discuss (14) JAMB 2010
567

Calculate the solubility in mol dm-3 of 40g of CuSO4 dissolved in 100g of water at 120°C?
[Cu = 64, S = 32, O = 16]

  • A. 4.00
  • B. 2.50
  • C. 0.40
  • D. 0.25
View Answer & Discuss (30) JAMB 2010
568

Coffee stains can best be removed by?

  • A. Kerosine
  • B. turpentine
  • C. a solution of borax in water
  • D. ammonia solution
View Answer & Discuss (24) JAMB 2010
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569

Carbon (II) oxide is considered dangerous if inhaled mainly because it?

  • A. can cause injury to the nervous system
  • B. competes with oxygen in the blood
  • C. competes with carbon (IV) oxide in the blood
  • D. can cause lung cancer
View Answer & Discuss (6) JAMB 2010
570

The acid that is used to remove rust is?

  • A. boric
  • B. hydrochloric
  • C. trioxonitrate (V)
  • D. tetraoxosulphate (VI)
View Answer & Discuss (10) JAMB 2010
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