A compound X on heating gives a colourless gas. The residue is dissolved in water to obtain Y. Excess CO2 is bubbled through aqueous solution of Y and Z is formed. Z on gentle heating gives back X. Th

Question

A compound X on heating gives a colourless gas. The residue is dissolved in water to obtain Y. Excess CO2 is bubbled through aqueous solution of Y and Z is formed. Z on gentle heating gives back X. The X is :

Prashant Kotian · Accepted Answer

Correct answer: A. Step 1: Mortar is a building material used to bind bricks or stones together. Step 2: It is prepared by mixing slaked lime (calcium hydroxide, Ca(OH)2), sand (silica, SiO2), and water into a thick paste. Step 3: Therefore, mortar is a mixture of Ca(OH)2, silica, and water, which corresponds to option (a).

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