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Chemistry JAMB Past Questions

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716
Which of the following represents the type of bonding present in ammonium chloride molecule?
  • A. Ionic only
  • B. Covalent only
  • C. Ionic and dative covalent
  • D. Dative covalent only
View Answer & Discuss (14) JAMB 1991
717
Which of the following is arranged in order of increasing electronegativity?
  • A. Chlorine, aluminium, magnesium, phosphorus, sodium
  • B. sodium, magnesium, aluminium, phosphorus, chlorine
  • C. Chlorine, phosphorus, phosphorous, aluminium, magnesium, sodium
  • D. Sodium, chlorine, phosphorus, magnesium, aluminium
View Answer & Discuss (5) JAMB 1991
718
A quantity of air was passed through a weighed amount of alkaline pyrogallol. An increase in the weight of the pyrogallol would result from the absorption of?
  • A. nitrogen
  • B. neon
  • C. argon
  • D. oxygen
View Answer & Discuss (5) JAMB 1991
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719
Which of the following ions is a pollutant in drinking water even in trace amounts?
  • A. Ca2+
  • B. Hg2+
  • C. Mg2+
  • D. Fe2+
View Answer & Discuss (10) JAMB 1991
720

The solubility of copper (II) tetraoxosulphate (Iv) is 75g in 100g of water at 100°C and 25g in 100g of water at 30°C. What mass of the salt would crystallize, if 50g of copper (II) tetraoxosulphate (VI) solution saturated at 100°C were cooled to 30°C ?

  • A. 57.5
  • B. 42.2
  • C. 28.6
  • D. 14.3
View Answer & Discuss (21) JAMB 1991
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