Biology
Assertion. Pesticides are the chemical substances used in agriculture to destroy pests.
Reason. DDT is an example of a pesticide which is widely used all over India. Pests are the enemies of crop.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Answer
A is True and R is False.
Explanation
DDT was banned for agricultural use in India in 1972.
Currently, the sole consumer of DDT in India is the Ministry of Health and Family Welfare, which utilizes it to control vector-borne diseases by spraying it on walls in houses and buildings affected by malaria in both rural and urban areas.
Related Questions
Assertion. Tubectomy is a temporary method of contraception for males in which the sperm ducts are cut and ligated with a nylon thread.
Reason. Tubectomy closes the passage of the sperms. The sperm duct is also known as vas deferens, which stores the sperms for some days during which they mature and become motile.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Fossil fuels are renewable and non-conventional sources of energy.
Reason. The underground reserves of coal and petroleum are depleting fast. People should look at other non-conventional sources of energy like solar energy, tidal energy, etc. for their use.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Ozone layer is a sort of sunscreen present high up in the atmosphere which prevents the harmful ultra-violet rays of the sun from harming us.
Reason. Ozone is an allotropic form of carbon which is formed in the atmosphere due to the release of chloroflurocarbons.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. The greenhouse effect is exacerbated by the presence of nitrogen oxides and sulphur oxides in the atmosphere, intensifying the absorption of heat and contributing to global warming.
Reason. Oxides of nitrogen and sulphur, primarily released through industrial activities and combustion processes, amplify the greenhouse effect by enhancing the heat-trapping capacities of the atmosphere, leading to an increase in the average global temperatures.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.