Efflorescence is shown by:

bleaching powder

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baking soda

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washing soda

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plaster of paris

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Solution

The correct option is D washing soda
Washing soda, the decahydrate of sodium carbonate effloresces in air forming sodium carbonate monohydrate. Efflorescence is the process of losing water of crystallization from a hydrated salt when kept exposed to air for a long time.

$N a_{2} C O_{3} .10 H_{2} O ⟶ N a_{2} C O_{3} . H_{2} O + 9 H_{2} O$

So, C is the correct.

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What is efflorescence ? Name one compound which exhibits efflorescence . Support your answer by giving balanced equation .

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