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
Correct Answer
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 not correct
D
Statement I is not correct but Statement II is correct
Explanation
Both statements are correct because rare earth elements like Europium and Terbium are essential for producing colors in displays specifically due to their ability to emit light (phosphorescence) when excited. Option (B) is the most tempting wrong choice, but it is incorrect because the phosphorescent property mentioned in Statement II is the direct scientific reason for the industrial application described in Statement I, making it a valid explanation. The core concept tested is the functional application of Rare Earth Elements (REEs) in modern technology based on their unique physical and chemical properties.
Rare Earth ElementsApplications of Rare Earth ElementsRare Earth ElementsPhosphorescenceDisplay TechnologiesStrategic MineralsElectronics Manufacturing