Question

5.Give reasons:
a. Gold and silver are found in their free state.
b. Sodium is never found in its free state.
c. The sulphide ore is converted into an oxide for the
extraction of metals.
d. The oxides of metals like Hg can be reduced by
heating only.​

Answer 1

Answer:

D. Hg+H2o=Hgo+H2

A. Gold and silver are available easily

Answer 2

Answer:

Explanation:a: becoz both gold and silver are less reactive metals

b:becoz sodium is a highly reactive metal

c: it is easier to extract the metal when it is in its oxide form by simple reduction process

d: becoz simple reduction of HgO takes place this process where a metal reduces on its own by heating is called autoreduction