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Chemistry 2006 JAMB Past Questions

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31

A decrease in atomic size and an increase in nuclear charge across a period lead to 

  • A. an increase in the tendency to lose electron
  • B. an increase in chemical reactivity
  • C. a decrease in electropositivity
  • D. a decrease in covalency in bond formation
View Answer & Discuss (16) JAMB 2006
32

The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is

  • A. dissolution → dryness → filtration → evaporation
  • B. filtration → sublimation → evaporation → dryness
  • C. sublimation → dissolution → filtration → evaporation
  • D. dissolution → filtration → sublimation → evaporation
View Answer & Discuss (8) JAMB 2006
33

The idea of planetary electron was that of

  • A. Rutherford
  • B. Thompson
  • C. Bohr
  • D. Dalton
View Answer & Discuss (30) JAMB 2006
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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34

If 30cm\(^3\) of gas at 50\(^0\)C is warmed to 80\(^0\)C at a fixed pressure, the fractional increase in volume is

  • A. 0.009
  • B. 0.093
  • C. 0.910
  • D. 1.090
View Answer & Discuss (46) JAMB 2006
35

2C\(_2\)H\(_2\)(g) + 5O\(_2\)(g) → 4CO\(_2\)(g) + 2H\(_2\)O(g)
In the reaction above, the mass of carbon(IV)oxide produced on burning 78 g of ethyne is
[C =12, O = 16, H = 1]

  • A. 264 g
  • B. 39 g
  • C. 352 g
  • D. 156 g
View Answer & Discuss (22) JAMB 2006
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