Salt `X` on heating gives `Y` which is a common constituent of washing powder and a gas `Z` which turns lime water milky. Identify `X`, `Y` and `Z`.

Options

A. A
B. B
C. C
D. D

Answer

B

Explanation

`underset("(Baking Soda) (X)") underset("Sodium hydrogen carbonate")(2NaHCO_(3(s)))overset("Heat")to underset((Y)) underset("Sodium carbonate")(Na_(2)CO_(3(s)))+H_(2)O_((l))+underset((Z)) underset("Carbon dioxide")(CO_(2(g)))`
`underset((Z))underset("Carbon dioxide")(CO_(2(g)))+underset("Lime water")(Ca(OH)_(2(aq)))to underset("(milkiness)")underset("White ppt.")(CaCO_(3(s)))+H_(2)O_((l))`