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Assertion : PCl(5) is covalent in gaseou...

Assertion : `PCl_(5)` is covalent in gaseous and liquid state but ionic in solid state.
Reason: `PCl_(5)` in solid state consists of tetrahedral `PCl_(4)^(+)` cation
and octahedral `PCl_(6)^(-)` anion.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze both the assertion and the reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion**: The assertion states that \( PCl_5 \) is covalent in the gaseous and liquid states but ionic in the solid state. - **Explanation**: In the gaseous and liquid states, \( PCl_5 \) exists as discrete molecules. The bonding between phosphorus and chlorine is covalent due to the sharing of electrons. However, in the solid state, \( PCl_5 \) tends to form ionic species. **Hint**: Consider the physical state of the compound and how it affects the type of bonding. 2. **Understanding the Reason**: The reason states that in the solid state, \( PCl_5 \) consists of tetrahedral \( PCl_4^+ \) cations and octahedral \( PCl_6^- \) anions. - **Explanation**: In the solid state, \( PCl_5 \) dissociates into \( PCl_4^+ \) and \( PCl_6^- \). The \( PCl_4^+ \) ion has a tetrahedral geometry, while the \( PCl_6^- \) ion has an octahedral geometry. This ionic dissociation supports the assertion that \( PCl_5 \) is ionic in solid form. **Hint**: Visualize the geometry of the ions formed in the solid state to understand their shapes and charges. 3. **Conclusion**: Both the assertion and the reason are true. The reason correctly explains why the assertion is true. Therefore, the answer is that both the assertion and the reason are true, and the reason is the correct explanation of the assertion. ### Final Answer: Both assertion and reason are true, and the reason is the correct explanation of the assertion.
To solve the question, we need to analyze both the assertion and the reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion**: The assertion states that \( PCl_5 \) is covalent in the gaseous and liquid states but ionic in the solid state. - **Explanation**: In the gaseous and liquid states, \( PCl_5 \) exists as discrete molecules. The bonding between phosphorus and chlorine is covalent due to the sharing of electrons. However, in the solid state, \( PCl_5 \) tends to form ionic species. **Hint**: Consider the physical state of the compound and how it affects the type of bonding. ...
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