Chemistry S Block Elements Important Compounds Calcium Online Exam Quiz

Chemistry S Block Elements Important Compounds Calcium GK Quiz. Question and Answers related to Chemistry S Block Elements Important Compounds Calcium. MCQ (Multiple Choice Questions with answers about Chemistry S Block Elements Important Compounds Calcium

In the average composition of portland cement, the percentage of magnesium oxide is a ___________

Options

A : 3 to 4%

B : 2 to 3%

C : 4 to 5%

D : 1 to 2%

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What is the enthalpy of heat for dissolving quicklime and water?

Options

A : 55 kJ/mol

B : 63 kJ/mol

C : 75 kJ/mol

D : 78 kJ/mol

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What is the average percentage of available chlorine theoretically?

Options

A : 85

B : 49

C : 58

D : 66

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Which of the following compound is formed when slaked lime is treated with excess dioxide in the presence of water?

Options

A : Barium sulphate

B : Calcium carbonate

C : Calcium hydroxide

D : Calcium bicarbonate

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Which of the following acid chemical formula first slaked lime?

Options

A : Calcium chloride

B : Calcium oxide

C : Calcium hydroxide

D : Calcium carbonate

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What is chloride of lime?

Options

A : Calcium sulphate

B : Calcium chloro hypochlorite

C : Calcium chloride

D : Calcium hydroxide

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Which of the following do you think is the correct formula for gypsum?

Options

A : CaSO4.2H2O

B : CaSO4.1/2H2O

C : CaSO4.H2O

D : CaSO4

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What is dead burnt plaster?

Options

A : Hexahydrate calcium sulphate

B : Hemihydrate calcium sulphate

C : Anhydrous calcium sulphate

D : Decahydrate calcium sulphate

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Which of the following is not a compound of mortar?

Options

A : Phenol

B : Quicklime

C : Sand

D : Water

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Which of the following is not a use of calcium chloro hypochlorite?

Options

A : Sterilization of water

B : Manufacture of chloroform

C : Germicide

D : Painting

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