Question

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.

Answer 1

(i), (iv)

(i) As₂O₃ < SiO₂ < P₂O₃ < SO₂   Acid strength.

(iv) H₂O > H₂S > H₂Se > H₂Te    Thermal stability.