JEE Advanced Chemistry question

Chemistry The p-Block Elements JEE Advanced

Match List-I (hydride) with List-II (boiling point) and select the correct answer.

Column-I: (A) NH3 (B) PH3 (C) AsH3 (D) SbH3 (E) BiH3 Column-II: (p) 290 K (q) 211 K (r) 186 K (s) 264 K (t) 240 K

Codes:

(A)A-r, B-q, C-t, D-s, E-p
(B)A-t, B-r, C-q, D-s, E-pCorrect
(C)A-p, B-s, C-t, D-q, E-r
(D)A-p, B-q, C-r, D-s, E-t

Answer: (B)

Solution

The boiling points of the Group 15 hydrides rise steadily from PH3 up to BiH3 (interrupted only by NH3's anomalously high value due to hydrogen bonding): PH3 ≈ 186 K (lowest, weakest van der Waals forces), AsH3 ≈ 211 K, SbH3 ≈ 264 K, BiH3 ≈ 290 K (highest, largest and most polarisable electron cloud among the simple

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Question ID VK-159267