.Give reasons for the following:
(i)Silver and copper lose their shine when they are exposed to air. Name the substance formed on their surface in each case.

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Solution

Silver reacts with the sulfur present in the environment to form silver sulfide which leads to the development of a black color on the surface.
Copper surfaces exposed to air gradually tarnish to a dull, brownish color due to the formation of copper oxide.

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.Give reasons for the following:(i)Silver and copper lose their shine when they are exposed to air. Name the substance formed on their surface in each case.

Silver reacts with the sulfur present in the environment to form silver sulfide which leads to the development of a black color on the surface.Copper surfaces exposed to air gradually tarnish to a dull, brownish color due to the formation of copper oxide.

.Give reasons for the following:
(i)Silver and copper lose their shine when they are exposed to air. Name the substance formed on their surface in each case.

Silver reacts with the sulfur present in the environment to form silver sulfide which leads to the development of a black color on the surface.
Copper surfaces exposed to air gradually tarnish to a dull, brownish color due to the formation of copper oxide.