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.

Give reason : Iron grills are frequently painted.

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

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

Give reasons for the following (i) Ammonia is used for cleaning window panes.

Give reasons for the following: Iron sheets are galvanized before use.

Give reasons for the following: iron is used in constructing bridges and dams.