Consider the following statements:
Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors.
Statement II: Some rare earth elements have phosphorescent properties
Which one of the following is correct in respect of the above statements?
- A.Both Statement I and Statement II are correct and Statement II explains Statement I
- B.Both Statement I and Statement II are correct but Statement II does not explain Statement I
- C.Statement I is correct but Statement II is incorrect
- D.Statement I is incorrect but Statement II is correct
▶ Answer & Explanation
Correct answer: A. Both Statement I and Statement II are correct and Statement II explains Statement I
Rare earth elements are crucial in modern display technologies due to their unique optical properties, including luminescence and phosphorescence. These properties enable the creation of vibrant colors and efficient light emission in devices like CRT and flat-panel displays. Statement II accurately describes a fundamental characteristic of many rare earth elements, which is directly applied in the manufacturing process mentioned in Statement I.
Source: UPSC gs1 2025