The ring size and the number of linked tetrahedral present in [Si₆ O₁₈]¹²⁻ are, respectively · ABC26IN0198
Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Ring Cage Cluster · Exam: CSIR NET 2015 · Marks: 2 · Difficulty: Medium
The ring size and the number of linked tetrahedral present in $\left[\mathrm{Si}_{6} \mathrm{O}_{18}\right]^{12-}$ are, respectively
(a)6 and 6
(b)12 and 6
(c)12 and 12
(d)6 and 12
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
[Si₆O₁₈]¹²⁻ (as in beryl) is a ring of six SiO₄ tetrahedra sharing corners. Six linked tetrahedra; the ring itself runs through 6 Si and 6 bridging O, so it is a 12-membered ring.