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Chemistry JAMB Past Questions

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461

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
From the equation above, calculate the mass of sodium hydroxide produced by 2.3g of sodium.
[H = 1, O = 16, Na = 23]

  • A. 0.40g
  • B. 0.80g
  • C. 4.00g
  • D. 8.00g
View Answer & Discuss (7) JAMB 2008
462

16.8 g of sodium hydrogen trioxocarbonate (IV) is completely decomposed by heat. Calculate the volume of carbon(IV) oxide given off at s.t.p
[Na 23, C = 12, O = 16, H = 1, Molar volume of a gas at s.t.p = 22.4 dm3]

  • A. 22.40 dm3
  • B. 11.20 dm3
  • C. 2.24 dm3
  • D. 1.12 dm3
View Answer & Discuss (9) JAMB 2008
463

300 cm3 of gas has a pressure of 800 mmHg. If the pressure is reduced to 650 mmHg, find its volume

  • A. 243.75 cm3
  • B. 369.23 cm3
  • C. 738.46 cm3
  • D. 1733.36 cm3
View Answer & Discuss JAMB 2008
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464

Diffusion is slowest in solid particles than in particles of liquid and gases because

  • A. solid particles have more kinetic energy than the particles of liquid and gases
  • B. solid particles have less kinetic energy than the particles of liqiud and gases
  • C. solid particles have less restriction in their movement than liquid and gas particles
  • D. the particles in solids are far apart and the cohesive forces between them are negligible
View Answer & Discuss (2) JAMB 2008
465

The experiment that showed that atoms have tiny positively charged nucleus was first carried out by

  • A. Moseley
  • B. Rutherford
  • C. Millikan
  • D. Dalton
View Answer & Discuss (3) JAMB 2008
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts