Question

Cement is made hard with




(a) dehydration

(b) hydration and dissociation of water
(c) Dissociation of water

(d) Polymerisation

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Answer 1

Cement is made hard with

• (a) dehydration
• (b) hydration and dissociation of water ✓
• (c) Dissociation of water
• (d) Polymerisation

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Answer 2

Explanation:

Cements (e.g., Portland cement) is harden because of hydration, chemical reactions that occur independently of the mixture's water content; they can harden even underwater or when constantly exposed to wet weather.