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Question: Answered & Verified by Expert
Carbon and silicon belong to the $14^{\text {th }}$ group. The maximum coordination number of carbon in commonly occurring compounds is 4 , whereas that of silicon is 6 . This is due to
Chemistryp Block Elements (Group 13 & 14)JEE Main
Options:
  • A Large size of silicon
  • B More electropositive nature of silicon
  • C Availability of low lying $d$-orbitals in silicon
  • D Both (a) and (b)
Solution:
1599 Upvotes Verified Answer
The correct answer is: Availability of low lying $d$-orbitals in silicon
Silicon has a coordination number of six owing to the presence of low energy d-orbitals which can also participate in bonding.

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