Question

carbon and chlorine combain to form which element​

Answer 1

Well, how many componds could methane form upon treatment with dihalogen under radical conditions…I count THREE…
$CH_{4}(g) + Cl_{2}(g) \stackrel{h\nu}\rightarrow CCl_{4} + HCCl_{3}+H_{2}CCl_{2} + H_{3}CCl + HCl$

…chloroform,
$HCCl_{3} \:$
, and methylene chloride,
$H_{2}CCl_{2} \:$
, are very common and powerful solvents… Carbon tet is not so much used in labs these days, because of safety concerns…
Dichlorocarbene, :
$CCl_{2} \:$
, is a reactive intermediate that can be generated by the action of base on chloroform
hope it helps you