Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: P Block Elements

Question:

Answer the question on basis of passage given below:

The noble gases have closed shell electronic configuration and are monatomic gases under normal conditions. The low boiling points of lighter noble gases are due to the weak dispersion forces between the atoms and the absence of other inter atomic interaction. The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers +2, +4 and +6.

\(XeF_4\) reacts violently with water to give \(XeO_3\). The compound of Xenon exhibit stereoisomerism and their geometries can be deduced considering the total number of electrons in the valence shell.

Match List-I with List-II

List-I List-II
(A) Its partial hydrolysis does not change the oxidation state of the central atom (I) \(He\)
(B) It is used in modern diving apparatus (II) \(XeF_6\)
(C) It is used to provide inert atmosphere for filling electrical bulbs (III) \(XeF_4\)
(D)  Its central atom is in \(sp^3d^2\) hybridization state (IV) \(Ar\)

Choose the correct answer from the options given below:

Options:

(A)-(II), (B)-(I), (C)-(IV), (D)-(III)

(A)-(I), (B)-(II), (C)-(III), (D)-(IV)

(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

(A)-(I), (B)-(II), (C)-(IV), (D)-(III)

Correct Answer:

(A)-(II), (B)-(I), (C)-(IV), (D)-(III)

Explanation:

The correct answer is option 1. (A)-(II), (B)-(I), (C)-(IV), (D)-(III).

(A) Its partial hydrolysis does not change the oxidation state of the central atom: This applies to noble gas compounds like xenon fluorides (XeF4 and XeF6) where xenon retains its oxidation state of 0 even after forming bonds with fluorine. This matches with (II) XeF6.

(B) It is used in modern diving apparatus: Helium (He) is used in modern diving mixtures due to its low solubility in blood, which reduces the risk of decompression sickness. This matches with (I) He.

(C) It is used to provide inert atmosphere for filling electrical bulbs: Argon (Ar) is an inert gas commonly used to fill incandescent light bulbs to prevent the filament from reacting with oxygen and burning out quickly. This matches with (IV) Ar.

(D) Its central atom is in \(sp^3d^2\) hybridization state: This hybridization is not applicable to simple atoms like helium or noble gas atoms. It's more likely found in molecules with a central atom forming multiple bonds. This eliminates options (I), (II), and (IV) leaving only (III) XeF4 as a possibility.