question_answer

Which of the following statement(s) is/are true about product, obtained by treatment of\[CC{{l}_{3}}CHO\]with chlorobenzene in presence of\[{{H}_{2}}S{{O}_{4}}\]? I. It has one chiral centre. II. It is used as an insecticide III. It is not easily metabolised by animals. IV. Its name is p,p-dichlorodiphenyltrichloroethane. Choose the correct option.

A)  I and II               

B)  II and III                

C)  II, III and IV                       

D)  only IV

Correct Answer: C

Solution :

 Idea This problem includes a conceptual mixing of preparation of DDT and its characteristics. To solve this problem use the concept of preparation and characteristic of DDT. First complete the given reaction and then read the characteristics given in question then choose the correct option. Preparation of DDT DDT is p, p-dichlorodiphenyl trichloroethane prepared by reaction of chlorobenzene with\[CC{{l}_{3}}-CHO\]in presence of\[{{H}_{2}}S{{O}_{4}}\]through electrophilic substitution reaction. Characteristics of DDT ? It is used as an insecticide to kill mosquito so that peoples are prevented by malaria. ? It is highly toxic towards fish. ?It is toxic for animals because it is not easily metabolized by animal. ?It has no any chiral centre. TEST Edge The question from the application of halogen containing organic compounds are asked generally in JEE Main. So, students are advised to go through clear and carefully study of application of halogen containing organic compounds such as Freon, chloroform etc.