Consider the following statements Statement I: Some rare earth elements are used in the manufacture of flat television screens an…

Question

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?

1. A. Both Statement I and Statement II are correct and Statement II explains Statement I (Correct answer)
2. B. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. C. Statement I is correct but Statement II is not correct
4. D. Statement I is not correct but Statement II is correct

Correct Answer

Option A — Both Statement I and Statement II are correct and Statement II explains Statement I

Detailed Solution & Explanation

The correct answer is Both Statement I and Statement II are correct and Statement II explains Statement I.

Key Points

• Rare earth elements like europium, terbium, and yttrium are used in phosphors — materials that emit light when excited by electrons.
• These phosphors are critical components of LED backlights, CRT monitors, and flat-panel displays.
• Statement II (phosphorescent properties of REEs) directly explains why REEs are used in TV screens and monitors (Statement I).
• Both statements are correct and II explains I.