Question:
Which of the following belong to non-silicate minerals?
(A) Hematite
(B) Dolomite
(C) Chlorites
(D) Kaolinite
Choose the correct answer from the options given below:
Which of the following belong to non-silicate minerals?
(A) Hematite
(B) Dolomite
(C) Chlorites
(D) Kaolinite
Choose the correct answer from the options given below:
(A) Hematite
(B) Dolomite
(C) Chlorites
(D) Kaolinite
Choose the correct answer from the options given below:
Show Hint
Silicate minerals always contain both silicon (\(\text{Si}\)) and oxygen (\(\text{O}\)) as their basic structural backbone, while oxides, carbonates, sulfates, and halides are non-silicates.
Updated On: Jul 21, 2026
- (A) only.
- (B) only.
- (A) and (B)
- (C) and (D)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Soil minerals are classified into silicates and non-silicates based on the presence of the silicon-oxygen tetrahedron (\(\text{SiO}_4^{4-}\)) structural unit.
Step 2: Detailed Explanation:
Let us evaluate each mineral listed:
1. Hematite (\(\text{Fe}_2\text{O}_3\)): This is an iron oxide mineral. It does not contain any silicon in its chemical structure. Therefore, it is a non-silicate mineral.
2. Dolomite (\(\text{CaMg(CO}_3)_2\)): This is a calcium-magnesium carbonate mineral. It also lacks silicon in its crystal structure, making it a non-silicate mineral.
3. Chlorites: These are a group of phyllosilicate (sheet silicate) minerals containing hydrated magnesium and iron silicates. Hence, they are silicate minerals.
4. Kaolinite (\(\text{Al}_2\text{Si}_2\text{O}_5(\text{OH})_4\)): This is a 1:1 aluminosilicate clay mineral. It is a classic silicate mineral.
Thus, Hematite (A) and Dolomite (B) are the non-silicate minerals.
Step 3: Final Answer:
Therefore, the correct answer is (A) and (B).
Soil minerals are classified into silicates and non-silicates based on the presence of the silicon-oxygen tetrahedron (\(\text{SiO}_4^{4-}\)) structural unit.
Step 2: Detailed Explanation:
Let us evaluate each mineral listed:
1. Hematite (\(\text{Fe}_2\text{O}_3\)): This is an iron oxide mineral. It does not contain any silicon in its chemical structure. Therefore, it is a non-silicate mineral.
2. Dolomite (\(\text{CaMg(CO}_3)_2\)): This is a calcium-magnesium carbonate mineral. It also lacks silicon in its crystal structure, making it a non-silicate mineral.
3. Chlorites: These are a group of phyllosilicate (sheet silicate) minerals containing hydrated magnesium and iron silicates. Hence, they are silicate minerals.
4. Kaolinite (\(\text{Al}_2\text{Si}_2\text{O}_5(\text{OH})_4\)): This is a 1:1 aluminosilicate clay mineral. It is a classic silicate mineral.
Thus, Hematite (A) and Dolomite (B) are the non-silicate minerals.
Step 3: Final Answer:
Therefore, the correct answer is (A) and (B).
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