Question

A calcium compound X on heating yields a compound Y and a colourless gas Z used by the green plants for photosynthesis. Solution of Y in water is used for white washing. Name X, Y
and Z. Write the balanced equation for the reaction of Y with water. Write one use of X.

Answer 1

Answer:

Explanation:

X - Calcium Carbonate (CaCO3)

Y - Calcium oxide (CaO)

Z - Carbon dioxide (CO2)

The base formed when Y is dissolved in water - Calcium hydroxide (CaOH)

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Answer 2

Answer:

CacO3 ----> Cao + CO2

CaO + H2O ----> Ca(OH)2

X is calcium carbonate

Y is calcium oxide

Z is carbon dioxide gas.

● CaCO3 is used for white washing.

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