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Which of the following orders are correc...

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

A

`As_(2)O_(3) lt SiO_(2) lt P_(2)O_(3) lt SO_(2)` - Acid strength

B

`AsH_(3) lt PH_(3) lt NH_(3)` - Enthalpy of vapourisation.

C

`S lt O lt Cl lt F` - More negative electron gain enthalpy.

D

` H_2O gt H_2S gt H_2Se gt H_2Te`- Thermal stability.

Text Solution

Verified by Experts

The correct Answer is:
A, D
Acidic strength increases with the increase in electronegativity of central atom.
Thermal stability of hydrides decreases down the group due to decrease in bond dissociation enthalpy of H-E bond (E = element of group-16).
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