Among the following correct statements are1) Sodium chloride is deliquescent due to impurities MgCl2 and CaCl22) The solubility of NaCl does not change appreciably with increase of the temperature3) Gas evolved at anode of Castner-Kellner cell is hydrogen4) Carbonate part of Na2CO3 gets hydrolysed in water to form alkaline solution

NaCl in pure state is non-deliquesent, but generally it is associated with impurities like MgCl2 & CaCl2 , Due to the presence of theses salts it acts as deliquescent→ Solubility of NaCl does not change appreciably with increases in temperature→ Hydration enthalpy of NaCl is -784.0 KJ/mole,Where as lattice enthalpy of NaCl is +788.0 KJ/mole. ΔHsolution of NaCl is negligibly small and hence no effect of temperature on its solubilityThe gas evolved at anode is "Cl2"→ Na2CO3 → 2Na+ + CO3-2Hint: Anion of weak acid and cation of weak base only undergoing hydrolysis, but the cation of strong base and anion of strong acid can't undergo hydrolysisCO3-2+2H2O→H2CO3+2OH-2Na+ + 2OH- → 2NaOHDue to the formation of OH- ions the solutions becomes alkaline in nature.∴Options 1,2,4 are correct