Correct statement(s) about the compounds $\mathbf{X}, \mathbf{Y}$ and $\mathbf{Z}$ is (are) $\mathrm{MnO}_{2}+$ Conc. $\mathrm{HCl} \rightarrow \mathbf{X}$ (greenish yellow gas) $\mathrm{NH}_{3}+\underset{(\text { excess })}{\mathbf{X}} \longrightarrow \mathbf{Y}$ $\mathbf{X}+\underset{\text { (excess) }}{\mathrm{F}_{2}} \xrightarrow{573 \mathrm{~K}} \mathbf{Z}$

(A) $\mathbf{X}$ is used for sterlizing drinking water.; (C) $\mathbf{Z}$ is used in the enrichment of ${ }^{235} \mathrm{U}$.

(B) $\mathbf{Y}$ has a planar structure.

(D) $\mathbf{Y}$ is a stronger Lewis base than ammonia.

JEE Advanced · 2026 · 17 May 2026 · Paper 1 · p-Block Elements

Correct statement(s) about the compounds

X, Y

and

Z

is (are)

MnO_{2} +

Conc.

HCl \to X

(greenish yellow gas)

NH_{3} + (excess) X ⟶ Y

X + (excess) F_{2} 573 K Z

Answer: (A), (C)

From the reactions:

(A)

Cl_{2}

is used for sterilizing drinking water. Correct.

(B)

NCl_{3}

has pyramidal structure (sp³ hybridization on N with one lone pair), not planar. Incorrect.

(C)

ClF_{3}

is used in enrichment of

^{235} U

by producing volatile

UF_{6}

U + 3 ClF_{3} \to UF_{6} + 3 ClF

. Correct.

(D)

NCl_{3}

is a weaker Lewis base than

NH_{3}

because the highly electronegative Cl atoms withdraw electron density from N (-I effect). Incorrect.

JEE Advanced · 2026 · 17 May 2026 · Paper 1 · One or more correct options