Question

4. Which of the following is not a metal ?
(a) Copper
(b) Silver
(c) Iron
(d) Phosphorus
5. A compound containing silicon and oxygen is
(a) common salt
() sodium carbonate
(c) sand
(d) sugar​

Answer 1

Explanation:

Answer:4

Copper, silver and iron are metals but phosphorus is not a metal.

Answer 5:

Silicates are salts containing anions of silicon (Si) and oxygen. There are many types of silicates, because the silicon-to-oxygen ratio can vary widely. In all silicates, however, silicon atoms are found at the centres of tetrahedrons with oxygen atoms at the

Answer 2

Answer:

Phosphorus

common salt