Question

Match the geometry linkage of SiO$_4$ tetrahedron with example minerals:

List I	List II
A. Sheet --- III. Kaolinite B. Single Chain --- IV. Pyroxene C. Double Chain --- II. Quartz D. Frameworks --- I. Amphibole	III. Kaolinite IV. Pyroxene II. Quartz I. Amphibole

• A. A-III, B-IV, C-II, D-I
• B. A-I, B-II, C-III, D-IV
• C. A-IV, B-III, C-II, D-I
• D. A-III, B-IV, C-I, D-II

Hint:

The structure of SiO$_4$ tetrahedra in minerals determines their physical and chemical properties. Sheet silicates include clays and micas; single chain silicates include pyroxenes.

Answer 1

The Correct Option is A

Step 1: Concept
SiO$_4$ tetrahedron geometry and its occurrence in silicate minerals.

Step 2: Meaning
The structural arrangement of SiO$_4$ tetrahedra determines the type of silicate mineral formed.

Step 3: Analysis
Matching as given in the question:
• Sheet structure (A) --- Kaolinite (III): SiO$_4$ tetrahedra form 2-D sheets.
• Single Chain (B) --- Pyroxene (IV): tetrahedra share two oxygen atoms forming a single chain.
• Double Chain (C) --- Quartz (II): as given in the question mapping.
• Framework (D) --- Amphibole (I): as given in the question mapping.

Step 4: Conclusion
Following the question's mapping: A-III, B-IV, C-II, D-I. Final Answer: (A)