The oxide from electric power station is?
A. carbon (IV) oxide B. copper (ll) oxide C. nitrogen (IV) oxide D. sulphur (IV) oxide Correct Answer: Option B B. copper (ll) oxideThe most common process in the extraction of metals from their ore is?
A. catalysis B. electrolysis C. oxidation D. reduction Correct Answer: Option D D. reductionWhich of the following gases is used to retard the vaporization of the filament in a light bulb?
A. Argon B. Helium C. Hydrogen D. Oxygen Correct Answer: Option A A. ArgonThe production of biogas from the fermentation of waste materials is an example of?
A. combustion B. incineration C. refining D. recycling Correct Answer: Option D D. recyclingProducts
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