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  • Which of the following orders are correct as per the properties mentioned against each ?

Which of the following orders are correct as per the properties mentioned against each?

(i) As_{2}O_{3}<SiO_{2}<P_{2}O_{3}<SO_{2}     Acid strength.

(ii) AsH_{3}<PH_{3}<NH_{3}     Enthalpy of vaporization.

(iii) S < O < Cl < F     More negative electron gain enthalpy.

(iv) H_{2}O >H_{2}S>H_{2}Se>H_{2}Te     Thermal stability.

Answers (1)

The answer is the option (i, iv) There is an increase in the acidic strength of the group as we move up the group or left to right along a period. As we move down the group, thermal stability of hydrides decreases.

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