Question

3. Give reasons why:
(a) gold is found in free state but iron is not.
(b) sodium reacts with cold water, whereas iron does not.
(c) copper cannot replace iron from its salt solution.
(d) copper is used for making electrical wires while silver is not.
(e) cooking utensils are made of metals whereas their handles are wooden.
(f) sodium is stored in kerosene.
(g) white phosphorous is stored under water.​

Answer 1

Answer:

a) becoz gold is a noble metal

b) because Na is easily diffused in H20

c) because Cu is lower than iron in matal activity series

d) WRONG CONCEPT BOTH ARE GREAT CONDUCTOR OF ELECTRICITY RATHER "SILVER"

CONDUCTS MORE THAN Cu

Yet, Cu is preferred more because it is cheaper than silver.

e)So that their handles doesn't conduct heat as wood is bad conductor of heat hence the person who will hold it by its handle will not get bruises...

f) because Ph when taken out in air gets fire

HOPE IT HELPS U....