When a white powder is added in water ,the water will become cloudy and you can see that in two parts.
Calcium breaks down into a white powder when burned with nitrogen, and when that powder dissolves in enough water, it turns into a gas (A) and an alkaline solution. After being exposed to air, the solution forms a thin, solid coating of (B) on the surface
Option 1 will be correct because when you add white powder the water will become cloudy and when you leave it for a time the powder will settle down the bottom.
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