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With reference to the Mercury, consider the following statements:
- It is a naturally occurring element that is found in air, water and soil.
- At threshold temperature, solid mercury offers resistance to the flow of electric current.
Which of the statements given above is/are correct?
- a)1 Only
- b)2 Only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
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With reference to the Mercury, consider the following statements: It i...
Recently, for the first time, physicists at the University of L’Aquila, Italy have found a complete microscopic understanding of the superconductivity of Mercury.
- In 1911, Dutch physicist Heike Kamerlingh Onnes discovered superconductivity in mercury.
- He found that at a very low temperature, called the threshold temperature, solid mercury offers no resistance to the flow of electric current.
- Scientists later classified mercury as a conventional superconductor because its superconductivity could be explained by the concepts of the Bardeen-Cooper-Schrieffer (BCS) theory.
- In BCS superconductors, vibrational energy released by the grid of atoms encourages electrons to pair up, forming so-called Cooper pairs.
- These Copper pairs can move like water in a stream, facing no resistance to their flow, below a threshold temperature.
What is Superconductivity?
- A material can conduct electricity without any resistance. It is observed in many materials when they are cooled below a critical temperature.
What is Mercury?
- It is a naturally occurring element that is found in air, water and soil.
- It is released into the atmosphere through natural processes such as weathering of rocks, volcanic eruptions, geothermal activities, forest fires, etc.
Hence only statement 1 is correct.
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With reference to the Mercury, consider the following statements: It i...
Correct Answer: Option A
Explanation:
1. True Statement: It is a naturally occurring element that is found in air, water and soil.
Mercury is indeed a naturally occurring element that can be found in various environmental sources such as air, water, and soil. It can enter the environment through natural processes like volcanic eruptions or human activities like mining and industrial processes.
2. False Statement: At threshold temperature, solid mercury offers resistance to the flow of electric current.
Solid mercury, at threshold temperature, actually becomes a superconductor and offers zero resistance to the flow of electric current. This property is unique to mercury and is known as superconductivity.
Therefore, only the first statement is correct, making option A the correct answer.
Explanation:
1. True Statement: It is a naturally occurring element that is found in air, water and soil.
Mercury is indeed a naturally occurring element that can be found in various environmental sources such as air, water, and soil. It can enter the environment through natural processes like volcanic eruptions or human activities like mining and industrial processes.
2. False Statement: At threshold temperature, solid mercury offers resistance to the flow of electric current.
Solid mercury, at threshold temperature, actually becomes a superconductor and offers zero resistance to the flow of electric current. This property is unique to mercury and is known as superconductivity.
Therefore, only the first statement is correct, making option A the correct answer.
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With reference to the Mercury, consider the following statements: It is a naturally occurring element that is found in air, water and soil. At threshold temperature, solid mercury offers resistance to the flow of electric current.Which of the statements given above is/are correct?a)1 Onlyb)2 Onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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