671. How is sulphur tetrafluoride prepared?

Why is XeF₂ linear in shape?

Why does fluorine not form oxoacids?

Assign reason for the following:
In solid state PCl₅ behaves as an ionic species.

Give reason for the following:
Among the noble gases only xenon is well known to form chemical compounds.

Complete the following:
${\mathrm{XeF}}_4+{\mathrm{H}}_2\mathrm{O} \to$

Write chemical reaction to show that chlorine gas can be obtained from bleaching powder.

Give chemical evidence for the following:
Fluorine is a stronger oxidising agent than chlorine.

Draw the structure of P₄O₁₀ and identify the number of single and double P — O bonds.

Draw molecular structures of (i) peroxo disulphuric acid, (ii) Iodine pentafluoride.