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Assertion : Octet rule is based upon the...

Assertion : Octet rule is based upon the chemical inertness of noble gases.
Reason : Octet rule can explain the shape and relative stability of the molecule.

A

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

B

both assertion and reason are true but reason in not the correct explanation of assertion.

C

assertion is true but reason is false.

D

both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given assertion-reason question, we need to analyze both the assertion and the reason separately. ### Step 1: Analyze the Assertion **Assertion:** "Octet rule is based upon the chemical inertness of noble gases." - The assertion states that the octet rule is derived from the observation of noble gases, which are chemically inert. - Noble gases (like Helium, Neon, Argon, etc.) have completely filled valence shells, which makes them stable and unreactive. - The octet rule suggests that atoms tend to gain, lose, or share electrons to achieve a filled valence shell, similar to that of noble gases. - Therefore, the assertion is **true**. ### Step 2: Analyze the Reason **Reason:** "Octet rule can explain the shape and relative stability of the molecule." - The reason states that the octet rule can explain the shape and relative stability of molecules. - However, the octet rule primarily focuses on the electron configuration and stability of individual atoms rather than the molecular geometry or the relative stability of molecules. - Molecular shapes and stability are better explained by concepts such as VSEPR theory (Valence Shell Electron Pair Repulsion) and molecular orbital theory. - Therefore, the reason is **false**. ### Step 3: Conclusion - Since the assertion is true and the reason is false, the correct answer is: **Assertion is true but reason is false.** ### Final Answer The correct option is: **C. Assertion is true but reason is false.** ---
To solve the given assertion-reason question, we need to analyze both the assertion and the reason separately. ### Step 1: Analyze the Assertion **Assertion:** "Octet rule is based upon the chemical inertness of noble gases." - The assertion states that the octet rule is derived from the observation of noble gases, which are chemically inert. - Noble gases (like Helium, Neon, Argon, etc.) have completely filled valence shells, which makes them stable and unreactive. - The octet rule suggests that atoms tend to gain, lose, or share electrons to achieve a filled valence shell, similar to that of noble gases. ...
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