Question : The chemical formula of gypsum is ______.
Option 1: CaSO4.2H2O
Option 2: CaSO4.H2O
Option 3: CaSO4
Option 4: CaSO4.(1/2)H2O
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Correct Answer: CaSO4.2H2O
Solution : The correct answer is CaSO4.2H2O
The chemical formula of gypsum is CaSO4.2H2O. It is a hydrated calcium sulphate mineral and is commonly found in sedimentary rock formations.
The "2H2O" in the formula represents two water molecules that are chemically bound to the calcium sulphate. Gypsum has various uses, including in the construction industry for making plaster and in agriculture as a soil conditioner.
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Question : The chemical formula of Gypsum is _________.
Option 1: CaSO4.12H2O
Option 2: MgSO4.12H2O
Option 3: MgSO4.2H2O
Option 4: CaSO4.2H2O
Question : The chemical formula of borax is
Option 1: Na2B5 O7 .10H2O
Option 2: Na2B4O7.10H2O
Option 3: Na2B4O7.5H2O
Option 4: Na2B4O7.12H2O
Question : The common name of the compound CaOCl2 is ______.
Option 1: bleaching powder
Option 2: washing soda
Option 3: baking soda
Option 4: gypsum
Question : What is the total surface area of a cone, if the slant height and radius of a cone are 30 cm and 14 cm, respectively?
Option 1: 1980 cm2
Option 2: 1963 cm2
Option 3: 1908 cm2
Option 4: 1936 cm³
Question : Which of the following is known as ‘Plaster of Paris’?
Option 1: 2CaSO4. 2H2O
Option 2: 2MgSO4.H2O
Option 3: 2MgSO4.7H2O
Option 4: 2CaSO4.H2O
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