Question

Harjeet noticed that her silver Bangle has turned black . Can you tell the reason behind it.​

Answer 1

The reason behind it is:

Silver turns black when kept in the air because it reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air.

This phenomenon is called corrosion.

Answer 2

Answer:

Silver Bangle of Harjeet turned black because the formation of a layer of Silver sulfide.

Explanation:

Silver is a white lustrous metal , it undergoes reaction in the presence of air, light and humidity. When silver metal is exposed to the atmosphere, the sulphur present in the surrounding  reacts with it and make a layer of Silver sulfide on the surface of the metal. The colour of silver sulfide is black . Silver is a noble metal and its atomic number is 47 . It is a d block element.