1.
X+C+Cl2high temperature (1000K)Y+CO\text{X} + \text{C} + \text{Cl}_2 \xrightarrow{\text{high temperature } (\approx 1000\,\text{K})} \text{Y} + \text{CO}; Y+2H2OZ+2HCl\text{Y} + 2\text{H}_2\text{O} \rightarrow \text{Z} + 2\text{HCl}. Compound Y is found in polymeric chain structure in solid phase and is an electron deficient molecule. Y must be