Question

3.
When a metal reacts with oxygen, the resulting oxide of the metal-
is a neutral oxide
turns blue litmus red
is a acidic oxide
is a basic oxide
4.
Out of the metals, gold, silver, copper and aluminium, the one, that is m
ductile, is-
gold
silver
aluminium
copper
5
.
Two of the metals, that cannot be stored either in air, or under water, are
sodium and magnesium
magnesium and calcium​

Answer 1

Answer:

3 .when a metal reacts with oxygen it forms metal oxide and for example if iron ( Fe ) is exposed in air , the oxygen ( O ) in the air will combine with iron ( Fe ) to form Iron oxide ( FeO2 ) where a reddish brown layer is formed in the iron which is known as rust the the process is known as rusting.