Is ch3cl2 possible? if yes what is the structure if it?

No, it is not possible

Explanation:

carbon is a tetravalent element. which means that it can form covalent bonds with various other elements as it has 4 electrons in its valence shell. in this compound, CH3Cl2, 3 electrons are already occupied with hydrogen. the only remaining electrom can be taken by a chlorine element forming a compound Chloromethane. but there is no space for another atom of chlorine to form CH3Cl2. therefore this compound is not possible

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.