Potassium is kept in

How many water molecules are present in the formula of crystalline lithium chloride?

The strongest reducing agent among the following is:

Which of the following metals reacts directly with nitrogen to form a nitride?

On heating,$LiNO_3$ gives how many compounds among the following?
$Li_2O, N_2, O_2, LiNO_2, NO_2$

Choose the compound of each of the following pairs that has the more solubility in water:
$(a) \, BeSO_4, BaSO_4$
$(b) \, NaCl, MgCl_2$
$(c) \, AgCl, AgI$