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Chemistry JAMB Past Questions

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2051

Liquid black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the ?

  • A. Acid
  • B. Ester of alkanoic acid
  • C. Alkali
  • C. Alkanol
View Answer & Discuss (8) JAMB 2020
2052

When water drops are added to calcium carbide in a container and the gas produced is passed through a jet and lighted, the resultant flame is called an?

  • A. Oxyethene
  • B. Oxyhydrocarbon flame
  • C. Oxyacetylene flame
  • D. Oxymethane flame
View Answer & Discuss (2) JAMB 2020
2053

Which of the following substances is a mixture?

  • A. Granulated sugar
  • B. Seawater
  • C. Sodium chloride
  • D. Iron filling
View Answer & Discuss (1) JAMB 2020
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2054

If the quantity of oxygen occupying 2.76L container at a pressure of 0.825 atm and 300k is reduced by one-half, what is the pressure exerted by the remaining gas?

  • A. 1.650atm
  • B. 0.825atm
  • C. 0.413atm
  • D. 0.275atm
View Answer & Discuss (48) JAMB 2020
2055

Four elements P, Q, R and S have atomic numbers of 4, 10, 12 and 14 respectively. Which of these elements is noble gas? 

  • A. P
  • B. Q
  • C. R
  • D. S
View Answer & Discuss (6) JAMB 2020
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