The correct order of bond enthalpy (kJ mol–1) is : (A) C – C Si – Si Ge – Ge Sn – Sn (B) C – C Si – Si Sn – Sn Ge – Ge (C) Si – Si C – C Ge – Ge Sn – Sn (D) Si – Si C – C Sn – Sn

Question

The correct order of bond enthalpy (kJ mol–1) is :

(A) C – C > Si – Si > Ge – Ge > Sn – Sn
(B) C – C > Si – Si > Sn – Sn > Ge – Ge
(C) Si – Si > C – C > Ge – Ge > Sn – Sn
(D) Si – Si > C – C > Sn – Sn > Ge – Ge

Prashant Kotian · Accepted Answer

Correct answer: A. As bond length increases, bond energy decreases.

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