Write four important minerals of potassium.

Write four important minerals of magnesium .

Write four important minerals of sodium and write their composition.

Write two important minerals of calcium. Give their composition

Write any four important advantages of poultry farming .

Write the important minerals of the following elements of d-block : titanium, cobalt, nickel, copper, zinc and silver.

Write any two minerals of Cu.

Write on the occurrence and important minerals of halogens

Write the importance of milk?

Write the important uses of aniline

Write important uses of helium.