1. Weak dispersion forces are present between noble gases and theses are also known as vanderwall forces of attraction. Hence (i) is true.

2. First ionization enthalpy of oxygen is 1175 KJ/ mol and first ionization enthalpy of xenon is 1170KJ/mol. Therefore there ionization enthalpies are almost same. Hence (ii) is true.

3. The oxidation state of all the elements during the hydrolysis of XeF₆ remains same, therefore it is not a redox reaction. Hence (iii) is false

4. Xenon fluorides are reactive. Hence (iv) is false.

Hence the correct answer is (i) and (ii).