Which of the following pesticides is out of use?
DDT
Identifying Pesticides Out of Use
The question asks which of the given pesticides is considered "out of use". This usually refers to substances that have been banned or severely restricted in many parts of the world due to their harmful environmental or health effects.
Analyzing the Options
Let's look at the options provided:
- DDT (Dichlorodiphenyltrichloroethane): This is a well-known synthetic pesticide. It was widely used in the past, particularly for controlling malaria-carrying mosquitoes and agricultural pests. However, due to its persistence in the environment, tendency to bioaccumulate in the food chain, and adverse effects on wildlife (especially birds) and potential health risks to humans, DDT was banned or severely restricted in many countries, including the United States, starting in the 1970s. While it might still be used in some limited cases for disease vector control in certain regions, it is largely considered "out of widespread use" or "out of use" in the context of general agriculture and public health in many developed nations.
- NaClO3 (Sodium Chlorate): This compound is primarily used as a herbicide and defoliant. It is also used in the production of chlorine dioxide for bleaching paper pulp. Sodium chlorate is still used in agriculture and industry, although its use might be regulated in some areas. It is not considered universally "out of use".
- Triazine: This refers to a class of nitrogen-containing heterocyclic compounds, many of which are used as herbicides (e.g., Atrazine, Simazine). Triazine herbicides are selective herbicides used to control weeds in various crops. While there have been concerns about the environmental impact and potential health effects of some triazines, and their use is regulated, the class as a whole is still widely used in agriculture globally. Individual triazine herbicides might face restrictions, but the class is not "out of use".
Comparing the Options
Based on the historical context and current status of these substances, DDT is the most prominent example among the options of a pesticide that is largely "out of use" due to bans and restrictions imposed decades ago because of its environmental persistence and toxicity.
Sodium Chlorate and Triazines, while subject to regulation, are still actively used in various applications.
Therefore, DDT fits the description of a pesticide that is out of use more accurately than the other options.
Important Questions from Haloalkanes And Haloarenes
Which of the following is used in industry as a solvent for fats, waxes, resins and rubbers?
Which of the following isomers has a high melting point?
Among the following statements, choose the correct statements.
A. SN2 reaction proceeds with stereo chemical inversion.
B. The process of conversion of Racemic mixture into enantiomer is known as Racemisation
C. A mixture containing 2 enantiomers in equal proportions is known as Racemic mixture.
D. The stereoisomers related to each other as superimposable mirror image are called enantiomers.
E. The objects which are non- superimposable on their mirror image are said to be chiral and this properly is known as chirality.
Choose the correct answer from the options given below:
Which of the following is a nucleophilic reagent?
Example of homogenous catalysts used in homogenous hydrogenation is _________.
