Q. Which pair of lanthanides is used in glass, blowers, goggles?
A) Np, Pu
B) Pu, Gd
C) Fm, Ho
D) Pr, Ho
Explanation
The correct answer is Option B: Pu, Gd.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.