CCl2 is an electrophile.
An electrophile is a chemical species that has an affinity for electrons. These species tend to react by accepting an electron pair that is generally from a nucleophile. They help in the electrophilic reactions and chemical bonds are formed. Some of the examples of electrophiles are: carbocation, electrophilic halogens, acids etc. In the case of :CCl2, the octet of the molecule is not complete and it requires two electrons in order to complete it.
The reaction sequence given below is carried out with 16 moles of X. The yield of the major product in each step is given below the product in parentheses. The amount (in grams) of S produced is ____. 
Use: Atomic mass (in amu): H = 1, C = 12, O = 16, Br = 80
