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Calcium Sulphate hemihydrate is commonly known as
(a)Plaster of Paris
(b)Gypsum
(c)Cement
(d)Double salt

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Important Questions on Acids, Bases and Salts
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What is gypsum? What happens when gypsum is heated to ?

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Write chemical formula of the following-
- Bleaching Powder

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Answer the following:
A calcium compound having odour of chlorine is used to remove yellowish-white clothes in laundries. Name the compound.

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