Which of the following statements about gypsum is not correct?

Which of the following is the quickest to react with water when the water is added to the cement?

Which of the following is not a property of a good electrical insulator?

Clay predominates in calcareous materials while calcium carbonate predominates in argillaceous materials.

The presence of cobalt in cement imparts _____ colour.

Tensile strength of leather belts should be about ___

During the setting action of the cement, tricalcium aluminate is formed within ____ after adding water to the cement.

In the wet process in the manufacturing of portland cement, argillaceous material is thoroughly mixed with water in ____…