Question

INDIA
SUBJECT: CHEMISTRY
ZOOM ASSIGNMENT
DATE: 30-04-2020
METALS AND NON METALS
Many metals, such as copper, zinc, tin, nickel, silver, gold, etc., are refined
In electrolytic refining process, the impure metal is made the
and a thin strip of
pure metal is made the
3.
A solution of the metal salt is used as an
On passing the current through the electrolyte, the pure metal from the
dissolves into the electrolyte.
5.
An equivalent amount of pure metal from the electrolyte is deposited on the
The soluble impurities go into the solution, whereas, the insoluble impurities settle
down at the bottom of the anode and are known as
Silver articles become black after some time when exposed to air. This is because it
reacts with Sulphur in the air to form a coating of
8.
Copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown
surface and gains a
colour coat
9
Iron when exposed to moist air for a long time acquires a coating of a brown flaky
substance called
10
Copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown
surface and gains a green coat. This green substance is​

Answer 1

Answer:

your assignment is very clear and perfect