Question

Assertion: ${}^{20}Ne$ and ${}^{22}Ne$ are isotopes.
Reason: Noble gases do not exist as isotopes as they are inert.

• A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
• B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
• C. If Assertion is correct but Reason is incorrect
• D. If Assertion is incorrect but Reason is correct

Answer 1

The correct option is C If Assertion is correct but Reason is incorrect

Neon ${(}_{10}Ne)$ has three stable isotopes, ${}^{20}Ne{,}^{21}Ne$, and ${}^{22}Ne$.
Neon exists as three different isotopes, therefore, assertion is true but reason is false.