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5 What would have been the colour of the sky if the Earth had no atmosphere?
6. Name the compound of calcium used f

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1. [tex] \huge \purple {answer}[/tex]

   Ans1) If the Earth had no atmosphere then the sky would have looked dark. The original colour of the sky(or space) is black. Just the atmosphere of the Earth gives the colour white, blue and dark blue.

   Ans2)The compound used for disinfecting drinking water is bleaching powder. The chemical formula of bleaching powder is CaOCl2

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