Question
Which of the following is only a redox reaction but not a disproportionation reaction?
BITSAT
Chemistry
Redox Reactions
2024
BITSAT 2024 (Memory Based Paper 2)
BITSAT Chemistry Question (2024) — Solution
Options
- A. 4 H _3 PO _3 3 H _3 PO _4+ PH _3
- B. 2 H _2 O _2 2 H _2 O + O _2
- C. P _4+3 NaOH +3 H _2 O 3 NaH _2 PO _2+ PH _3
- D. P _4+8 SOCl _2 4 PCl _3+2 ~S _2 Cl _2+4 SO _2
Answer
D. P _4+8 SOCl _2 4 PCl _3+2 ~S _2 Cl _2+4 SO _2
Step-by-step solution
The reaction P _4+8 SOCl _2 4 PCl _3+2 ~S _2 Cl _2 +4 SO _2 involves change of oxidation state of P from 0 to +3 and that of S from +4 to +2 . Thus, it is a redox reaction but not a disproportionation reaction.
Related: Chemistry — Redox Reactions · All PYQ Banks