Q35 of 74 Page 207

How are XeO3 and XeOF4 prepared?

1) XeO3 can be produced by hydrolysis of XeF4 and XeF6 under controlled pH of the medium in which reaction is taking place as shown below:


6XeF4 + 12H2O → 4Xe + 2XeO3 + 24HF + 3O2


XeF6 + 3H2O → XeO3 + 6HF


2) XeOF4 can be obtained on partial hydrolysis of XeF6 as shown below:


XeF6 + H2O → XeOF4 + 2HF


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33

How are xenon fluorides XeF2, XeF4 and XeF6 obtained?

 34

With what neutral molecule is ClO– isoelectronic? Is that molecule a Lewis base?

 36

Arrange the following in the order of property indicated for each set:

(i) F2, Cl2, Br2, I2 - increasing bond dissociation enthalpy.


(ii) HF, HCl, HBr, HI - increasing acid strength.


(iii) NH3, PH3, AsH3, SbH3, BiH3 – increasing base strength.

 37

Which one of the following does not exist?

(i) XeOF4 (ii) NeF2 (iii) XeF2 (iv) XeF6