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Monday, 06 April 2026
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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 31:
Water is said to be 'hard' if it
  • A Easily forms ice
  • B Has to be warmed before sodium chloride dissolves in it
  • C Froms an insoluble scum with soap
  • D Contains nitrates
  • E Contains sodium ions
View Answer & Explanation
Question 32:
Sodium hydroxide (NaOH) pellets are
  • A Deliquescent
  • B Hygroscopic
  • C Efflorescent
  • D Hydrated
  • E Fluorescent
View Answer & Explanation
Question 33:
Alkanes
  • A Are all gases
  • B Have the general formula CnH2n + 2O
  • C Contain only carbon and hydrogen
  • D Are usually soluble in water
  • E Are usually active compounds
View Answer & Explanation
Question 34:
If an excess of a liquid hydrocarbon is poured into a jar of chlorine, and the sealed jar is then exposed for several hours to bring sunlight, all the chlorine gas is consumed. The hydrocarbon is said to have undergone
  • A A polymerization reaction
  • B An isomerization reaction
  • C An addition reaction
  • D A substitution reaction
  • E A reduction reaction
View Answer & Explanation
Question 35:
The function of conc. H2SO4 in the esterification of ethanoic acid with ethanol is to
  • A Serve as a dehydrating agent
  • B Serve as a solvent
  • C Act as a catalyst
  • D Prevent any side reaction
  • E Serve as an oxidizing agent
View Answer & Explanation