Write 'true' or 'false':
1. Economic strength of a country depends upon the quality of its chemists.
2. Chemistry has solved most of the problems facing mankind.
3. Fertilisers increase food production.
4. Plastic is a good substitute of wood.
5. Diodes are used in improved fuels.
6. CFC is used in refrigerators as a coolant.
Answer (2)
The answers to the statements are: 1) True, 2) False, 3) True, 4) True, 5) False, 6) True. These responses reflect the role of chemistry and other factors in economics, food production, and environmental issues. Understanding these principles is essential in recognizing the impact of science on society.
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Let's take a look at each statement one by one and evaluate their validity:
Economic strength of a country depends upon the quality of its chemists.
False: While chemists contribute significantly to various industries such as pharmaceuticals, agriculture, and manufacturing, the economic strength of a country depends on a multitude of factors, including governance, infrastructure, human resources across various fields, natural resources, and technological advancements.
Chemistry has solved most of the problems facing mankind.
False: Chemistry has certainly played a crucial role in solving many problems, such as providing medicines, creating new materials, and developing processes for energy production. However, it has not solved most problems, as many challenges remain, such as sustainable energy production, pollution, and health issues, which require interdisciplinary approaches.
Fertilisers increase food production.
True: Fertilizers can significantly increase food production by providing essential nutrients to crops, improving growth and yields. However, it's important to use them responsibly to prevent environmental harm.
Plastic is a good substitute for wood.
True/False: Plastics can serve as substitutes for wood in some applications due to their durability and versatility. However, they are not always better, especially considering environmental impacts such as pollution and non-biodegradability.
Diodes are used in improved fuels.
False: Diodes are semiconductor devices that manage electrical current. They are not directly used in fuels but rather in electronic circuits.
CFC is used in refrigerators as a coolant.
True: Chlorofluorocarbons (CFCs) were commonly used as coolants in refrigerators and air conditioners. However, due to their harmful effects on the ozone layer, their use has been phased out in many countries and replaced by more environmentally friendly alternatives.
