Question
For the reaction sequence given below, the correct statement(s) is(are) (In the options, X is any atom other than carbon and hydrogen, and it is different in P , Q and R )
JEE Advanced
Chemistry
Haloalkanes and Haloarenes
2025
JEE Advanced 2025 (Paper 1)
JEE Advanced Chemistry Question (2025) — Solution
Options
- A. C-X bond length in P , Q and R follows the order Q > R > P .
- B. C-X bond enthalpy in P , Q and R follows the order R > P > Q .
- C. Relative reactivity toward S _ N 2 reaction in P , Q and R follows the order P > R > Q .
- D. p K_ a value of the conjugate acids of the leaving groups in P , Q and R follows the order R > Q > P .
Answer
B. C-X bond enthalpy in P , Q and R follows the order R > P > Q .
Step-by-step solution
(A) Wrong: bond length order Q > P > R (B) Correct: Bond enthalpy R > P > Q (C) Wrong: S _ N 2 reactivity Q > P > R (D) Wrong: pKa ( HI P > Q ( pKa )
Related: Chemistry — Haloalkanes and Haloarenes · All PYQ Banks