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A student burns a metal ribbon in air and collects the white ash formed. Identify the correct sequence of events.
Answer variants:
After cleaning, the ribbon is heated in air
Before burning, the magnesium ribbon is cleaned using sandpaper
During burning, magnesium reacts with oxygen present in the air
Cleaning removes this oxide layer and exposes fresh magnesium metal for reaction
A white powder formed is magnesium nitride
A white powder (ash) is formed, which is magnesium oxide
Cleaning removes the shiny nature of magnesium ribbon
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