Which of the following orders are correct as per the properties mentioned against ?
(a) `As_(2)O_(3)ltSiO_(2)ltP_(2)O_(3)SO_(2)` Acid strength.
(b) `AsH_(3)ltPH_(3)ltNH_(3)` Enthalpy of vaporisation.
(c )`SltOltClltF` More negative electron gain enthalphy.
(d) `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te` Thermal stability.

Answer

A, D

Explanation

(a) `underset("acidic strength increases")overset(As_(2)O_(3)ltSiO_(2)ltP_(2)O_(3)ltSO_(2))to`
(b) Correct order is `underset("enthalphy of vaporization")overset(AsH_(3)gtPH_(3)gtNH_(3))to`
(c ) `SltOltClltF` More negative electron gain enthalpy
(d) `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te` Thermal stability decreases on movind top to botten due to increase in its bond length.