WAEC Chemistry 2023 Objective — Question 6
Question 6 of 50 from the West African Examinations Council (WAEC) Chemistry 2023 Objective paper, with the correct answer and a full explanation.
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Alkenes can be manufactured by
- A. addition of hydrogen to unsaturated vegetable oils
- B. the cracking of hydrocarbonsCorrect
- C. polymerization reactions
- D. the combustion of alkanes
Explanation
Alkenes can be obtained from the cracking of hydrocarbons. (Combustion of alkanes produces CO2 and H2O; addition of hydrogen to vegetable oils produces margarine, using a nickel catalyst at about 200°C.)
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