Chemistry · Oct / Nov 2016 · Paper 12 · Question 30
5070Alkenes
Which statement about the uses of gases is not correct?
- AHelium is used in balloons because it is unreactive and less dense than air.
- BHydrogen is used in an addition reaction with saturated vegetable oils to form margarine.
- CNitrogen from the air is used in the manufacture of ammonia.
- DOxygen is used in making steel and welding.
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Correct answer: B. Hydrogen is used in an addition reaction with saturated vegetable oils to form margarine.
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