Why do gold ornaments look new even after several years of use?

Metals X and Y can be recovered from the anode mud left behind after the electrolytic refining of copper metal. The coins made of metal X look new even after several years of use but the coins made of metal Y lose their shine gradually and get blackened soon. when metal X is alloyed with a small amount of metal Y, it becomes hard and hence suitable for making ornaments. what are metals X and Y? Also state the colour of metal X.

Give reason for the following (i) Iron grills are frequently painted. (ii) Gold ornaments retain their lustre even after several years of use.

Give reasons for the following : Ionic compounds have high melting points and boiling points. (ii) Ionic compounds conduct electricity in molten state. (iii) Ionic compounds are solids at room temperature and are somewhat hard. (iv) Ionic grills are frequently painted. (v) Gold ornaments retains their lustre even after several years of use.

Why do clouds generally look white ?

Why do clouds generally look white ?

Why do gold and silver do not corrode ?

A house wife gave someof her gold ornaments to a person for polishing.The person became happy. He conducted some chemical reactions and returned the polished ornaments.Name the solvent used to dissolve gold.

why do leaves look green in colour