1.
CH3_3CH2_2OH Cl2(step-1)\xrightarrow{\text{Cl}_2\text{(step-1)}} CH3_3CHO 3Cl2(step-2)\xrightarrow{3\text{Cl}_2\text{(step-2)}} Cl3_3CCHO. In the above reactions, the role of Cl2_2 in step-1 and step-2 respectively is: