Ncert Exercises & Solutions

Match the species given in Column I with the shape given in Column II and mark the correct option.

Column I		Column II
A.	Its partial hydrolysis does not change the oxidation state of the central atom.	1.	He
B.	It is used in modern diving apparatus.	2.	XeF₆
C.	It is used to provide an inert atmosphere for filling electrical bulbs.	3.	XeF₄
D.	Its central atom is in sp³d²hybridisation.	4.	Ar

Codes:

Options:	A	B	C	D
1.	1	4	2	3
2.	1	2	3	4
3.	2	1	4	3
4.	1	3	2	4

Hint: Xe hybridization in XeF₄ is sp³d².

(A) Partial hydrolysis of XeF₆ does not change the oxidation state of the central atom. The reaction is as follows:

XeF₆ + 2H₂O → XeO₂F₂ + 4HF

(B) Helium is used as a diluent for oxygen in modern diving apparatus because of its very low solubility in blood.

(C) Argon is used mainly to provide an inert atmosphere in high-temperature metallurgical processes (arc welding of metals or alloys) and for filling electric bulbs.

(D) The hybridization of Xe in XeF₄ is sp³d² hybridization.

Hence, option third is the correct answer.

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