An oxide of a bivalent metal on heating with coke gives a compound 'X' and a gas 'Y'. The gas 'Y' reacts with chlorine gas to give a poisonous gaseous compound. 'X' undergoes hydrolysis to give a hydrocarbons 'Z' with two carbon atoms. Identify the compound X,Y, and Z. Also give the reactions involved.

Explanation

(i) Identification of hydrocarbons.
(ii) Identification of metal which gives hydrocarbons with 2 carbon atoms on hydrolysis.
(iii) Products formed on reaction of metal oxide with coke.
(iv) Reaction of gaseous product with chlorine.