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Friday, 22 May 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 761:
Duralumin consists of aluminium, copper, ?
  • A Zinc and gold
  • B Lead and maganese
  • C Nickle and silver
  • D Manganese and magnesium
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Question 762:
CaO<sub style='font-size: smaller;'>s</sub> + H<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>(l)</sub> → Ca(OH)<sub style='font-size: smaller;'>2</sub><sub style='font-size: smaller;'>(s)</sub> ΔH -65 kj. The process represented by the above equation is known as?
  • A Dissolution
  • B Slaking
  • C Liming
  • D Mortaring
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Question 763:
The carbon atoms in ethene are?
  • A Sp<sup style='font-size: smaller;'>3</sup> hybridized
  • B Sp hybridized
  • C Sp<sup style='font-size: smaller;'>2</sup> hybridized
  • D Not hybridized
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Question 764:
Which of the following compounds reacts with sodium metal as well as silver and copper salts ?
  • A CH<sub style='font-size: smaller;'>3</sub>C Ξ C—CH<sub style='font-size: smaller;'>3</sub>
  • B CH<sub style='font-size: smaller;'>3</sub>CH<sub style='font-size: smaller;'>2</sub>CH<sub style='font-size: smaller;'>23</sub>>
  • C CH<sub style='font-size: smaller;'>3</sub>C Ξ CH
  • D CH<sub style='font-size: smaller;'>3</sub>CH = CH CH<sub style='font-size: smaller;'>3</sub>
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Question 765:
Which of the following are isomers?
  • A Ethanol and dimethyl ether
  • B Benzene and methybenzene
  • C Ethanol and propanone
  • D Trichloromethane and tetrachloromethane
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