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Chemistry 1999 JAMB Past Questions

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1

200cm3 each of 0.1M solutions of lead (II) trioxonitrate(V) and hydrochloric acid were mixed. Assuming that lead (II) chloride is completely insoluble, calculate the mass of lead (II) chloride that will be precipitated.
[Pb = 207, Cl= 35.5, N = 14, O = 16]

  • A. 2.78g
  • B. 5.56g
  • C. 8.34g
  • D. 11.12g
View Answer & Discuss (28) JAMB 1999
2
56.00cm3 of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas?
[Molar volume of a gas at S.T.P = 22.4dm3]
  • A. 11.00
  • B. 22.00
  • C. 33.00
  • D. 44.00
View Answer & Discuss (7) JAMB 1999
3
Which of the following gases will diffuse fastest when passed through a porous plug?
[H = 1, C = 12, N = 14, O = 16]
  • A. Propane
  • B. Oxygen
  • C. Methane
  • D. Ammonia
View Answer & Discuss (18) JAMB 1999
WAEC offline past questions - with all answers and explanations in one app - Download for free
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4
Which is the temperature of a given mass of a gas initially at 0°C and 9 atm, if the pressure is reduced to 3 atm at constant volume?
  • A. 91K
  • B. 182K
  • C. 273K
  • D. 819K
View Answer & Discuss (20) JAMB 1999
5
Which of the following will have its mass increased when heated in air?
  • A. Helium
  • B. Magnesium
  • C. Copper pyrites
  • D. Glass
View Answer & Discuss (11) JAMB 1999
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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