1.
In the following sequence, 2CHCl3+6Ag2\,\text{CHCl}_3 + 6\,\text{Ag} is converted through intermediate steps (using reagents such as a red-hot iron tube, CO/HCl+AlCl3\text{CO}/\text{HCl} + \text{AlCl}_3, or Tollen's reagent [Ag(NH3)2]+[\text{Ag}(\text{NH}_3)_2]^+) to a final product DD.

Product DD will be: