Question

A substance 'X' is used for white washing the walls which on reaction with carbon dioxide in the air gives shiny appearance due to the formation of a compound 'Y'. Identify X and Y

X- Ca(OH)2 and Y -CaCO3
X - CaO and Y- CaCO3
X- Cao and Y- Ca(OH)2
X- Ca(OH)2 Y- CaO​

Answer 1

X: CaO and Y: Ca(OH)2

Explanation:

calcium oxide on reacting with CO2 forms calcium hydroxide