Substitution reactions

[darkphoenix]

LOL hate these type of questions with really bad wording. Even after you think its right, you re-read it and begin to second guess yourself.

[Mao]

Its all in the question. This is typical substitution reaction.

You should have eliminated D straight away because as you said the question states Cl2 so there are only 2 chlorine atoms therefore you cant make CCl4.

This will be the case if the question stated "One methane molecule reacts with one Cl2 molecule...".

In general, common sense dictates that we have to work in a macroscopic scale, i.e. with billions upon billions of molecules.

This question tests your understanding on reaction mechanisms, that being with substitution reactions of simple alkanes, there is no preference of substituting at any position, thus all positions may be substituted to an unknown extent. You'll be building up on this idea next semester with equilibrium.

And B is not wrong, but D is 'more correct'.