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Chemistry Past Questions

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1031
If the temperature of a gas is increased?
  • A. the kinetic energy of the emolecules will decrease
  • B. the pressure will decrease if the volume is constant
  • C. the gas will occupy a greater volume if the pressure is constant
  • D. the mass of the gas will decrease
  • E. the pressure and volume will increase
View Answer & Discuss (16) JAMB 1982
1032
When a little brine was added to a metal nitrate a white precipitate was formed which first turned violet and then black on exposure to ai. The metal nitrate is therefore?
  • A. sodium nitrate
  • B. mercuric nitrate
  • C. lithium nitrate
  • D. silver nitrate
  • E. potassium nitrate
View Answer & Discuss (6) JAMB 1982
1033

If atom X with six electrons in its outermost shell combines with atom Y with one electron in its outermost shell to form an ionic compound, then?

  • A. six atoms of X will combine with one of Y
  • B. two atoms of X will combine with six of Y
  • C. one atom of X will combine with two of Y
  • D. two atoms of X will combine with one of Y
  • E. one atom of X will combine with six of Y
View Answer & Discuss (12) JAMB 1982
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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1034
The nitrogen gas obtained by burning an excess of phosphorus in air has a density higher than the nitrogen from nitrogen compounds because the nitrogen from air is contaminated with?
  • A. some unburnt phosporus
  • B. P2O5 vapour
  • C. some oxygen
  • D. rare gases
  • E. carbondioxide
View Answer & Discuss (4) JAMB 1982
1035
When air is passed through alkaline pyrogallol and then over quicklime, the only gases left are?
  • A. nitrogen and carbondoxide
  • B. the rare gases
  • C. nitrogen and oxygen
  • D. nitrogen and the rare gases
  • E. nitrogen, carbonioxide and the rare gases
View Answer & Discuss (11) JAMB 1982
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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