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Saturday, 23 May 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 841:
The general formula of alkanoates is?
  • A RCHO
  • B R<sub style='font-size: smaller;'>2</sub>CO
  • C RCOOH
  • D RCOOR
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Question 842:
One mole of a hydrocarbon contains 48 g of carbon. If it vapour density is 28, the hydrocarbon is?
  • A An alkane
  • B An alkene
  • C An alkyne
  • D Aromatic (C = 12, H = 1)
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Question 843:
Which of the following reagents will confirm the presence of unsaturation in a compound?
  • A Fehling's solution
  • B Bromine water
  • C Tollen's reagent
  • D Benedict's solution
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Question 844:
The diagram above represents an atom of
  • A Magnesium
  • B Helium
  • C Chlorine
  • D Neon
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Question 845:
The set-up above would be useful for determining the amount of
  • A Oxygen in air
  • B Water vapour in air
  • C CO<sub style='font-size: smaller;'>2</sub> in air
  • D Arygen in air
View Answer & Explanation