Which of the following orders are correct as per the properties mentioned against each?
(i) As2O3 < SiO2 < P2O3 < SO2 Acid strength.
(ii) AsH3 < PH3 < NH3 Enthalpy of vapourisation.
(iii) S < O < Cl < F More negative electron gain enthalpy.
(iv) H2O > H2S > H2Se > H2Te Thermal stability.