Question

(i) Name ‘X’ and 'Y'.
(ii) What happens when ‘X’ is passed into lime water?

Answer 1

Answer:

On the electrolysis of brine, chlorine gas is deposited over anode which gives calcium oxychloride (Bleaching powder) on passing over slaked lime. The bleaching powder is used in disinfecting the drinking water.

Ca(OH)2 + Cl2 ⇨ CaOCl2 + H2O

explanation:

(i)Metal carbonate ‘X’ is calcium carbonate.

Solution ‘Y’ is lime water (Calcium hydroxide).

Ca(OH)2 +CO2→CaCO3 +H2O

(ii)When carbon dioxide is passed through lime water, it turns milky due to formation of white precipitate in form of calcium carbonate.

Answer 2

Answer:

1. For 3d diagrams, the names " abscissa" and "ordinate" are rarely used for 'x' and 'y' , respectively. The words abscissa, ordinate and applicate are sometimes used to refer to coordinate axes rather than the coordinate value.
2. When excess of carbon dioxide is passed in lime water, calcium carbonate is converted to calcium bicarbonate which is soluble , hence the milkiness due to calcium carbonate disappears.