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Carbonic Acid + Ca(OH)2 ⇨ X. What is the main compound in X?

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Carbonic Acid + Ca(OH)2 ⇨ X. What is the main compound in X?

(a) CaCO2

(b) CO2

(c) CaCO3

(d) H2O

The question was posed to me in quiz.

I'm obligated to ask this question of Types of Shrinkage topic in section Elasticity, Creep and Shrinkage of Concrete Technology

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Right option is (c) CaCO3

To explain: It is a chemical reaction. It causes contraction of concrete which is known as Carbonation shrinkage.

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