Identify compound X in the following sequences of reactions: (NEET 2020) (a) (b) (c) (d)

ALKYL AND ARYL HALIDES 36 50. The correct sequence of bond enthalpy of C-X bond is (NEET 2021) (a) 3 3 3 3 CH F CH Cl CH Br CH I (b) 3 3 3 3 CH Cl CH F CH Br CH I (c) 3 3 3 3 CH F CH Cl CH Br CH I (d) 3 3 3 3 CH F CH Cl CH Br CH I Due to high bond length C-I has bond strength and has less bond dissociation enthalpy. Because of short bond C – F has high bond dissociation enthalpy so that increasing order of bond dissociation enthalpies. SOLID STATE 37 Exercise – 3: Achievers Section Single Choice Questions