When excess chlorine reacts with methane in presence of sunlight, which is the major product?(a) Refrigerant – 40(b) Methylene chloride(c) Chloroform(d) Carbon tetrachlorideI had been asked this question in homework.The doubt is from P-Block Elements topic in division P-Block Elements of Chemistry – Class 12

When excess chlorine reacts with methane in presence of sunlight, whic

1.	When excess chlorine reacts with methane in presence of sunlight, which is the major product?(a) Refrigerant – 40(b) Methylene chloride(c) Chloroform(d) Carbon tetrachlorideI had been asked this question in homework.The doubt is from P-Block Elements topic in division P-Block Elements of Chemistry – Class 12
Answer» The CORRECT answer is (d) Carbon tetrachloride The best I can explain: In PRESENCE of SUNLIGHT, a free radical substitution reaction takes place between the reacting methane and chlorine molecules where in each elementary reaction a hydrogen atom is replaced by a chlorine atom in the new product. First, methane converts to 1-chloromethane which in TURN produces DICHLOROMETHANE followed by tri-chloromethane and tetra-chloromethane, respectively.

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