1.
CaOCl2+H2OCa(OH)2+X\text{CaOCl}_2 + \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2 + \text{X}
X+CH3CHOY\text{X} + \text{CH}_3\text{CHO} \rightarrow \text{Y}
Y+Ca(OH)2CHCl3\text{Y} + \text{Ca(OH)}_2 \rightarrow \text{CHCl}_3

What is Y?