Lesson: Chapter 16 — Changes of Matter

16.5. Hydrogen and oxygen 6 of 8 Reset answers

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Question 6

Which gas is used to make margarine from vegetable oils?

A Carbon dioxide (CO₂) B Nitrogen (N₂) C Oxygen (O₂) D Hydrogen (H₂)

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Hydrogen (H₂). It is also used to make ammonia, as a rocket fuel, and for reducing organic compounds.

Oxygen is used for respiration, combustion and welding. Carbon dioxide is used in fire extinguishers and fizzy drinks.

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