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Chemistry JAMB Past Questions

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1741
Which of the following is a measure of the average kinetic energy of the molecules of a substance?
  • A. volume
  • B. mass
  • C. pressure
  • D. temperature
View Answer & Discuss (3) JAMB 1992
1742
The nucleus of the isotopes tritium,contains
  • A. two neutrons with no protons
  • B. one neutron and one proton
  • C. two neutrons and one proton
  • D. two neutrons, one proton and one electron
View Answer & Discuss (5) JAMB 1992
1743

CO(g) + H\(_2\)O(g) \(\to\) \(CO_{2g}\) + H\(_2\)(g)  \(\Delta\)H = - 4100J. Which of the following factors favour the formation of hydrogen in the above reaction? i. high pressure. ii. low pressure iii. high-temperature iv. use of excess steam

  • A. i, iii and iv
  • B. iii only
  • C. ii, iii and i
  • D. iv only
View Answer & Discuss (4) JAMB 1989
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1744
The Avogadro number of 24g of magnesium is the same as that of
  • A. 1g of hydrogen molecules
  • B. 16g of oxygen molecules
  • C. 32g of oxygen molecules
  • D. 35.5g of chlorine molecules
View Answer & Discuss (11) JAMB 1990
1745
10cm3 of hydrogen fluoride gas react with 5cm3 of dinitrogen difluoride gas (N2F2) to form 103 of a single gas. Which of the following is the most likely equation of the reaction?
  • A. HF + N2F2 \(\to\) N2HF3
  • B. 2HF + N2F2 \(\to\) 2NHF2
  • C. 2HF + N2F2 \(\to\) N2H2F3
  • D. HF + 2N2F2 \(\to\) N4HF2
View Answer & Discuss (13) JAMB 1986
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