JEE Advanced 2025 Paper 2 Q06 Chemistry Inorganic Chemistry p-Block Elements (Groups 15-18) Easy

JEE Advanced 2025 Paper 2 · Q06 · p-Block Elements (Groups 15-18)

The compound(s) with P-H bond(s) is(are):

  1. A. $H_3PO_4$
  2. B. $H_3PO_3$
  3. C. $H_4P_2O_7$
  4. D. $H_3PO_2$
JEE Advanced multi-correct — pick every correct option, then check.
Reveal answer + step-by-step solution

Correct answer:B, D

Solution

Number of P-H bonds determined by the structure of each oxoacid: $H_3PO_4$ (orthophosphoric acid): all three H are on $-OH$ groups; 0 P-H bonds. $H_3PO_3$ (phosphorous acid): structure $(HO)_2P(=O)H$; has 1 P-H bond (only 2 of 3 H are ionizable). TRUE. $H_4P_2O_7$ (pyrophosphoric acid): structure $(HO)_2(O=)P-O-P(=O)(OH)_2$; 0 P-H bonds. $H_3PO_2$ (hypophosphorous acid): structure $(HO)P(=O)(H)_2$; has 2 P-H bonds (only 1 of 3 H ionizable). TRUE. Correct: (B), (D).

Want to drill deeper? Open this question inside SolveKar AI and tap "Why?" on any step — the AI Mentor reads your full solution context and explains until it clicks. Download SolveKar AI →