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