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Na(2)SeO(4) and Na(2)SO(4) are:...

` Na_(2)SeO_(4)` and `Na_(2)SO_(4)` are:

A

Isomorphous

B

Polymorphs

C

Alloys

D

Ferromagnetic

Text Solution

AI Generated Solution

The correct Answer is:
To determine the relationship between \( \text{Na}_2\text{SeO}_4 \) and \( \text{Na}_2\text{SO}_4 \), we can analyze their structures and properties step by step. ### Step 1: Identify the Chemical Structures - **Sodium Selenate (\( \text{Na}_2\text{SeO}_4 \))**: This compound consists of sodium ions (\( \text{Na}^+ \)) and selenate ions (\( \text{SeO}_4^{2-} \)). The selenate ion has a central selenium atom bonded to four oxygen atoms, with two of them having double bonds and the other two carrying negative charges. - **Sodium Sulfate (\( \text{Na}_2\text{SO}_4 \))**: This compound consists of sodium ions and sulfate ions (\( \text{SO}_4^{2-} \)). The sulfate ion has a central sulfur atom bonded to four oxygen atoms, similarly structured with double bonds and negative charges. ### Step 2: Compare the Crystal Structures - Both \( \text{Na}_2\text{SeO}_4 \) and \( \text{Na}_2\text{SO}_4 \) exhibit similar arrangements of ions in their crystal lattice. The arrangement of sodium ions and their corresponding anions (selenate and sulfate) leads to similar geometric configurations. ### Step 3: Define Isomorphism - **Isomorphism**: This term refers to the phenomenon where two or more compounds have the same crystal structure but different chemical compositions. Since both \( \text{Na}_2\text{SeO}_4 \) and \( \text{Na}_2\text{SO}_4 \) have the same crystal structure, they are classified as isomorphous. ### Step 4: Eliminate Other Options - **Polymorphism**: This refers to compounds that have the same chemical composition but different structural arrangements. Since \( \text{Na}_2\text{SeO}_4 \) and \( \text{Na}_2\text{SO}_4 \) have the same structure, they are not polymorphous. - **Alloys**: Alloys are mixtures of metals, and since these compounds are not metallic in nature, they cannot be classified as alloys. - **Ferromagnetic Materials**: These materials exhibit strong magnetic properties, typically involving metals like iron, nickel, or cobalt. Neither \( \text{Na}_2\text{SeO}_4 \) nor \( \text{Na}_2\text{SO}_4 \) possess ferromagnetic properties. ### Conclusion Thus, the correct classification for \( \text{Na}_2\text{SeO}_4 \) and \( \text{Na}_2\text{SO}_4 \) is that they are **isomorphous**. ---
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