Which one of the following statements regarding Bleaching powder and D.D.T. is correct?

Bleaching powder and D.D.T. are chemically distinct but share chlorine as a common constituent. Bleaching powder, primarily calcium hypochlorite [Ca(OCl)2], is an inorganic compound produced by the action of chlorine gas on dry slaked lime [1][2][5]. It is widely used as a bleaching and disinfecting agent [4]. Conversely, D.D.T. (dichlorodiphenyltrichloroethane) is a chlorinated hydrocarbon, making it an organochlorine or organic compound [1]. While bleaching powder contains calcium, D.D.T. does not; however, both substances contain chlorine atoms in their molecular structures [1][2]. Specifically, D.D.T. contains several chlorine atoms attached to its organic framework, while bleaching powder contains chlorine in the form of hypochlorite and chloride ions [1][2][3]. Therefore, the only shared characteristic among the given options is that both contain chlorine.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 2: Acids, Bases and Salts > Bleaching powder > p. 30
2. [2] https://www.sciencedirect.com/topics/chemistry/ccca
3. [5] https://www.science.gov/topicpages/c/chlorinated+hydrocarbon+insecticides
4. [4] https://www.usbr.gov/research/dwpr/reportpdfs/report155.pdf
5. [3] https://www.sciencedirect.com/topics/chemistry/calcium-hypochlorite