Question

What is the colour of bleaching powder -( yellowish white/blue)? Why bleaching powder changes its colour blue to white?

Answer 1

Answer:

Assertion: When bleaching powder is left in the open, its colour changes from blue to white. Reason: The change in colour as oxygen breaks away from the compound

Explanation:

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Answer 2

Answer:

blue

Explanation:

the bleaching powder = Na2CO3.10H2O

when it is heated or given small amount of heat it loses water of crystallization i.e 10 H2O therefore it's colour changes to white