A. Copper
B. Iron
C. Mercury
D. None of these
🧠 Explanation:
Mercury, a liquid metal, is used in fluorescent tubes and traditional thermometers due to its conductivity and thermal expansion properties. It enables efficient lighting and accurate temperature measurement but is toxic, leading to safer alternatives. Understanding mercury’s use is key in chemistry and environmental science, highlighting its role in technology and health risks. Studying it emphasizes the balance of innovation and safety, a critical topic in materials science and environmental regulations, ensuring sustainable technological advancements.
