Match the column : ( array |l|l|l|l| & Column-I & & Column-I (A) & He & (i) & array l It's partial hydrolysis does not change oxidation state of central atom. array (B) & XeF ₆ & (ii) & It is used in modern diving appratus. (C) & XeF ₄ & (iii) & array l It is used to provide inert atmosphere for filling electrical bulbs. array (D) & Ar & (iv) & array l Its central atom has sp ^3 ~d ^2 hybridisation array array )

Step-by-step solution

- A) ( He ) (ii) Helium is used in modern diving gas mixtures (e.g., heliox) because it reduces nitrogen narcosis. - B) ( XeF ₆ ) (i) ( XeF ₆ ) undergoes partial hydrolysis where xenon remains in the same oxidation state (+6), so the central atom's oxidation state does not change. - C) ( XeF ₄ ) (iv) The geometry of ( XeF ₄ ) (square planar with two lone pairs) corresponds to an ( sp ^3 ~d ^2 ) hybridisation of the central xenon. - D) ( Ar ) (iii) Argon is used to provide an inert atmosphere when filling electric b