A-LevelChemistryGroup 29701/12 · May/June 2015 · Q131 Mark
What happens when a piece of magnesium ribbon is placed in cold water?
Avigorous effervescence occurs.
BBubbles of gas form slowly on the magnesium.
CThe magnesium floats on the surface of the water and reacts quickly.
DThe magnesium glows and a white solid is produced.
✓ Correct answer
B: Bubbles of gas form slowly on the magnesium.
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