Question

State True or False.

Setting of cement is an endothermic process.

• A. True
• B. False

Answer 1

The correct option is B False

When water is mixed with cement to form a paste, reaction starts. In its pure form, the finely ground cement is extremely sensitive to water. Out of the three main compounds, $C_{3}A,C_{3}Sand{C}_{2}S$, reacts quickly with water to produce a jelly-like compound which starts solidifying.

The action of changing from a fluid state to a solid state is called setting and should not be confused with hardening, which is a exothermic process.

So the statement is False.

Hence option B is correct.