Reason for highest catenation of carbon

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C–C bond is strong

C is more electronegative

C has only one stable isotope

C has higher ionisation potential value

answer is D.

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Detailed Solution

This is because C—C bonds are very strong. Down the group the size increases and electronegativity decreases, and, thereby, tendency to show catenation decreases. This can be clearly seen from bond enthalpies values. The order of catenation is C > > Si > Ge ≈ Sn. Lead does not show catenation.

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