SSC Selection Post 2022 PYQ — Question 50

The correct answer is option 3 i.e. Silver

• Silver is the most electrically conductive metal, as well as having a high thermal conductivity.
• This is due to the fact that silver has just one valence electron.
• Silver is often employed in electrical circuits and contacts because of its high electrical and thermal conductivity and because it does not easily spark.
• It is used in batteries for portable surgical equipment, hearing aids, pacemakers, and space flight when reliability is required and weight limits apply.
• It is good for coating contacts, mirrors, and conductors in telecom applications because it has low contact wear resistance and high optical reflectivity.
• It is nearly white, lustrous, soft, very ductile, and malleable.
• It is not a chemically active metal, but it is attacked by nitric acid (forming the nitrate) and by hot concentrated sulfuric acid.
• It is mostly utilized as a valuable metal, but its halide salts, particularly silver nitrate, are commonly used in photography.