Question

The expanded form of DDT is
A. Dichloro diphenyl trichloroethane
B. Dichloro diethyl trichloroethane
C. Dichloro dipyridyl trichloroethane
D. Dichloro diphenyl tetra chloroacetate

Answer 1

Hint: DDT is an organic chemical and crystalline in nature. DDT does not occur in nature. It is artificially synthesized by Friedel Crafts Reaction between a chloral and equivalents of chlorobenzene.

Complete step by step answer: 

DDT is the abbreviated form of Dichloro Diphenyl Trichloroethane. This chemical compound is artificially made in laboratories. The reaction involved is a Friedel Crafts Reaction between a chloral and equivalents of chlorobenzene.

Therefore, option (a) is correct.

Additional Information: 

> DDT was first synthesized by Othmar Zeidler. However, Paul Hermann Muller received the Nobel Prize in Physiology for discovering the insecticidal use of DDT. DDT was first used in World War II to control malaria.
> DDT was used extensively as pesticide in agriculture. But the response to commercial DDT was mixed. Certain fractions of the population were against the usage of DDT in agriculture. At present, the use of DDT is banned in many parts of the world owing to its toxicity in animals, especially in birds. DDT is deemed as an organic pollutant of the environment. 

> Use of DDT is known to cause eggshell thinning of animals. In humans, DDT can cause carcinogenic reactions and functions to disrupt the secretions of the endocrine system. 

> Case studies have labelled DDT to be the cause of breast cancer.

Note: DDT or Dichloro Diphenyl Trichloroethane is an artificially synthesized organic molecule. DDT was first used in World War II to control malaria. Thereafter, it was widely used as an insecticide in agriculture. It is banned in many parts of the world at present due to its toxic effects on the environment and living organisms, including humans.