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Chemistry 1986 JAMB Past Questions

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16
Which of the following sulphides is insoluble in dilute HCl?
  • A. Na2S
  • B. ZnS
  • C. CuS
  • D. FeS
View Answer & Discuss (2) JAMB 1986
17
When chlorine is passed into water and subsequently exposed to sunlight, the gas evolved is?
  • A. HCl
  • B. HOCl
  • C. O2
  • D. Cl2O
View Answer & Discuss (9) JAMB 1986
18
A substance Z reacts with NaOH to give salt and water only. When Z is treated with dilute HCl, a gas is evolved which gives a yellow suspension on passing into concentrated H2SO4. Substance Z is?
  • A. NaHS
  • B. Na2SO3
  • C. Na2S
  • D. NaHSO3
View Answer & Discuss (13) JAMB 1986
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19
Ammonia gas is normally dried with?
  • A. concentrated sulphuric acid
  • B. quicklime
  • C. anhydrous calcium chloride
  • D. magnesium sulphate
View Answer & Discuss (2) JAMB 1986
20
What are the values of x, y and z respectively in the equation: xCu + yHNO3 → xCu(NO3)2 + 4H2O + zNO?
  • A. 4: 1: 2
  • B. 3:8:2
  • C. 2:8:3
  • D. 8:3:2
View Answer & Discuss (7) JAMB 1986
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