The correct order of density of $Be, Mg, Ca, Sr$ is

Give the preparation,properties,and uses of calcium oxide or quick lime $(CaO)$.

Explain the chemical properties of alkaline earth metals (Group $2$) in detail.

Which of the following fluorides has the lowest melting point?

What happens when:
$(i)$ magnesium is burnt in air
$(ii)$ quick lime is heated with silica
$(iii)$ chlorine reacts with slaked lime
$(iv)$ calcium nitrate is heated?

Give the uses of alkaline earth metals.