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The silicates which contain discrete ani...

The silicates which contain discrete anions are

A

Sheet silicates

B

Ortho silicates

C

Three dimensions silicates

D

Pyrosilicate

Text Solution

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The correct Answer is:
To solve the question regarding which silicates contain discrete anions, we can analyze the options provided: 1. **Understanding Silicates**: Silicates are compounds that contain silicon and oxygen, and they can be classified based on the arrangement of their tetrahedral units (SiO4). 2. **Analyzing the Options**: - **Sheet Silicate**: In sheet silicates, each tetrahedral unit shares three oxygen atoms with adjacent tetrahedra, forming a two-dimensional sheet structure. The basic unit is Si2O5^2-, which is indeed a discrete anion. - **Orthosilicate**: Orthosilicates have isolated tetrahedra (SiO4^4-), which means they do contain discrete anions. - **Three-Dimensional Silicate**: In three-dimensional silicates (like quartz), the tetrahedra are linked in all three dimensions, which does not correspond to discrete anions. - **Pyrosilicate**: Pyrosilicates consist of chains of tetrahedra and do not contain discrete anions. 3. **Conclusion**: Based on the analysis, both **sheet silicates** and **orthosilicates** contain discrete anions. However, the question specifically asks for silicates that contain discrete anions, and the most straightforward answer would be **orthosilicates**. **Final Answer**: Orthosilicates contain discrete anions.
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