Question

Based on their reactivity, most of the metals are found in combined state in the earth's crust
while some metals such as silver,______
and______
are found in free state. The
compounds of metals which occur naturally in the earth's crust are known as_______
The
minerals from which metals can be profitably extracted are called______
Ores mined from
earth usually contain large amount of impurities like sand, soil, etc. These impurities are
called________
The extraction of metals from their ores and then refining them for use is
known as________
​

Answer 1

Explanation:

1. The equatorial regions fall in the:

a) Frigid Zone.

b) Temperate Zone

c) Torrid Zone

d) None of these

Answer 2

Answer:

1] gold and copper 2] minerals 3] ores 4] gangue 5] enrichment of ores

Explanation: