Question

Which of the following metals do not react with cold water?

• A. Gold
• B. Platinum
• C. Silver
• D. Calcium

Answer 1

Answer: (A), (B), (C)

Silver

Metal reacts with water to form metal hydroxide and hydrogen gas. So calcium reacts with water to form calcium hydroxide and hydrogen gas. The bubbles of the hydrogen gas stick to the surface of the calcium metal and makes it float. The reaction takes place as follows:

$\text{Ca(s)}+2{\text{H}}_2\text{O(l)}\to {\text{Ca(OH)}}_2\text{(aq)}+{\text{H}}_2\text{(g)}$

Metals like gold, silver, copper or platinum are least reactive in nature. So, they do not react with cold water at all.