PDF chapter test TRY NOW
Answer the following questions:
1. What are polyatomic ions? Give examples.
The ions which contain more than (same kind or different kind) and behave as a unit are called ions, e.g., \(OH^-\), \(SO_4{^2}{^-}\), \(CO_3{^2}{^-}\).
2. Give the names of the elements present in the following compounds.
(a). Quick lime :: :: Elements :: Calcium and oxygen.
(b). Hydrogen bromide :: Elements :: .
(c). Baking powder :: :: Elements :: Sodium, hydrogen, carbon and oxygen.
(d). Potassium sulphate :: Elements :: .