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Chemistry Past Questions

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3001
Some properties of chemical substances are mentioned below... i. sour taste ii. slippery touch iii. yields alkaline gas with ammonium salt iv. has pH less than 7 v. turns phenolphthalein pink.

Which of the above are NOT typical properties of alkalis?
  • A. i, iv and v
  • B. iv and v
  • C. i and iv
  • D. ii and v
  • E. ii, iii and iv
View Answer & Discuss (10) JAMB 1985
3002
A certain volume of gas at 298k is heated such that its volume and pressure are now four times the original values. What is the new temperature?
  • A. 18.6k
  • B. 100.0k
  • C. 298.0k
  • D. 1192.0k
  • E. 4768.0k
View Answer & Discuss (5) JAMB 1985
3003

Hydrogen is not liberated when trioxonitrate(v)acid reacts with zinc because

  • A. zinx is not rendered passive by acid
  • B. hydrogen produced is oxidized to water
  • C. oxides of nitrogen are produced
  • D. all nitrates are soluble in water
  • E. trioxonitrate(v)acid is a strong acid
View Answer & Discuss (6) JAMB 1985
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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3004
The boiling point of water, ethanol, toluene and butan-2-ol are 373.0k, 351.3k, 383.6k and 372.5k respectively. Which liquid has the highest vapour pressure at 323.0k?
  • A. water
  • B. toluene
  • C. ethanol
  • D. butan-2-ol
  • E. none
View Answer & Discuss (19) JAMB 1985
3005
In what respect will two dry samples of nitrogen gas differ from each other if sample 1 is prepared by completely removing CO2 and O2 from air, and sample 2 is prepared by passing purified nitrogen(i)oxide over heated copper? sample 1 is
  • A. purer than sample 2
  • B. slightly denser than sample 2
  • C. in all respects the same as sample 2
  • D. colourless but sample 2 has a light brown colour
  • E. slightly less reactive than sample 2
View Answer & Discuss (1) JAMB 1985
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