Electrostatic force is medium dependent that is why NaCl dissolves in water comment on this statement.

Electrostatic force between two charges is called central force. Why?

The electrostatic force between two charges is governed by Coulomb.s law. On which factors does the electrostatic force between two charges depend and how?

Select correct statement. (i) Mixture of NH_4Cl and NaNO_2 on heating gives N_2 gas . ( ii) CFC is used as refrigerating fluid and as propellant in aerosols ( iii) Phosgene is formed when P_4 reacts with NaOH (iv) Phosgene dissolves in water forming P_2O_5

Sulphuric acid is not prepared by dissolving SO_3 in water. Why?

If the air medium between the two charges is replaced by water what change you expect in the electrostatic force and why?