Chemical Properties of Group 18 Elements

Assertion (A) : Helium & Beryllium have similar outer electronic configuration $n{s}^2$

Reason (R) : Both are chemically inert

The correct statement about Xenon fluorides ${\mathrm{XeF}}_2, {\mathrm{XeF}}_4$ and ${\mathrm{XeF}}_6$ is

In the preparation of compounds of $\mathrm{Xe}$, Bartlett had taken ${\mathrm{O}}_2^{+} \mathrm{Pt} {\mathrm{F}}_6^{-}$ as a base compound. This is because

Which of the following noble gas does not form clathrate compound? 

Consider the following reactions :
(i) ${\mathrm{PCl}}_3+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_3{\mathrm{PO}}_3+3\mathrm{HCl}$
(ii) ${\mathrm{SF}}_4+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_2{\mathrm{SO}}_3+4\mathrm{HF}$
(iii) ${\mathrm{BCl}}_3+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_3{\mathrm{BO}}_3+3\mathrm{HCl}$
(iv) ${\mathrm{XeF}}_6+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{XeO}}_3+6\mathrm{HF}$

Then according to given information the incorrect statement is

which of the following is an uncommon hydrolysis product of ${\mathrm{XeF}}_2$ and ${\mathrm{XeF}}_4?$

Which one of the following does not exist?

Cotyledons are also called-

The reaction of solid $\mathrm{X}\mathrm{e}{\mathrm{F}}_2$ with $\mathrm{A}\mathrm{s}{\mathrm{F}}_5$ in 1:1 ratio affords

$\mathrm{X}\mathrm{e}{\mathrm{F}}_6$ on complete hydrolysis gives –

Consider following properties of the noble gases.

I : They readily form compounds which are colourless.
II : They generally do not form ionic compounds.
III : Xenon has variable oxidation states in its compounds.
IV : The smaller He and Ne do not form clathrate compounds.
Select correct properties.

Which of the following does not form clathrate?

Which one of the following does not exist?

Which of the following is not true about helium ?