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QNEET-2021-Ch-579: NEET 2021 Chemistry - Class 11 NEET-2021-Ch-579 Solution: The correct sequence of bond enthalpy of 'C-X' bond is:…

The correct sequence of bond enthalpy of 'C-X' bond is: CH3−Cl>CH3−F>CH3−Br>CH3−ICH_3-Cl > CH_3-F > CH_3-Br > CH_3-I CH3−F<CH3−Cl<CH3−Br<CH3−ICH_3-F < CH_3-Cl < CH_3-Br < CH_3-I CH3−F>CH3−Cl>CH3−Br>CH3−ICH_3-F > CH_3-Cl > CH_3-Br > CH_3-I CH3−F<CH3−Cl>CH3−Br>CH3−ICH_3-F < CH_3-Cl > CH_3-Br > CH_3-I

Multiple Choice Options

  • A CH 3 - Cl > CH 3 - F > CH 3 - Br > CH 3 - l
  • B CH 3 - F < CH 3 - Cl < CH 3 - Br < CH 3 - l
  • C CH 3 - F > CH 3 - Cl > CH 3 - Br > CH 3 - l
  • D CH 3 - F < CH 3 - Cl > CH 3 - Br > CH 3 - l

Step-by-Step Verified Solution

On moving down the group from F to I, the size of atom increases. Order of the size of halogen atoms is I > Br > Cl > F. So, the bond length of C�X bond also increases from F to I and hence, the bond enthalpy decreases from F to I. Correct order of bond length of C�X bond is H 3 C - I > H 3 C - Br > H 3 C - Cl > H 3 C - F. Correct order of bond enthalpy is H 3 C - F > H 3 C - Cl > CH 3 - Br > H 3 C - I.

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