Following are the examples of silicate minerals (I) Zircon, ZrSiO₄ (II) Beryl, Be₃ Al₂ Si₆ O₁₈ (III)… · ABC26IN0474
Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Element – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Medium
Following are the examples of silicate minerals (I) Zircon, $\mathrm{ZrSiO}_{4}$ (II) Beryl, $\mathrm{Be}_{3} \mathrm{Al}_{2} \mathrm{Si}_{6} \mathrm{O}_{18}$ (III) Pyrophyllite, $\mathrm{Al}_{2}(\mathrm{OH})_{2}\left[\left(\mathrm{Si}_{2} \mathrm{O}_{5}\right)_{2}\right]$ The correct structural description of the minerals is
(a)I-ortho silicate, II-Cyclic silicate and III-Sheet silicate
(b)I-ortho silicate, II-Sheet silicate and III-Cyclic silicate
(c)I-Cyclic silicate, II-Sheet silicate and III-Ortho silicate
(d)I-Sheet silicate, II-Ortho silicate and III-Cyclic silicate
Answer
Answer: A ✓ checked by 4AB · confidence high
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
Zircon contains isolated SiO₄⁴⁻ tetrahedra (orthosilicate); beryl has the Si₆O₁₈¹²⁻ ring (cyclosilicate); pyrophyllite has Si₂O₅²⁻ layers (sheet silicate).