If first ionization enthalpies of elements X and Y are 419 kJ mol$$-$$1 and 590 kJ mol$$-$$1, respectively and second ionization enthalpies of X and Y are 3069 kJ mol$$-$$1 and 1145 kJ mol$$-$$1, respectively. Then correct statement is :
The incorrect statement about denaturation of proteins is :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The metal carbon bond in metal carbonyls possesses both $$\sigma$$ and $$\pi$$ character.
Reason (R) : The ligand to metal bond is a $$\pi$$ bond and metal to ligand bond is a $$\sigma$$ bond.
In the light of the above statements, choose the most appropriate answer from the options given below.
Which of the following is the most stable carbocation?
![NEET 2022 Phase 2 Chemistry - Some Basic Concepts of Organic Chemistry Question 18 English Option 1](https://app-content.cdn.examgoal.net/fly/@width/image/1ldl4iw7n/b94a97a3-8c49-4f9a-8eea-6e8fccb77e34/957c8540-a1e2-11ed-86df-09b64f1bed76/file-1ldl4iw7o.png?format=png)
![NEET 2022 Phase 2 Chemistry - Some Basic Concepts of Organic Chemistry Question 18 English Option 2](https://app-content.cdn.examgoal.net/fly/@width/image/1ldl4j8w5/289171a3-281d-459f-ba18-63db2f5a2b88/9f47ff50-a1e2-11ed-86df-09b64f1bed76/file-1ldl4j8w6.png?format=png)
![NEET 2022 Phase 2 Chemistry - Some Basic Concepts of Organic Chemistry Question 18 English Option 3](https://app-content.cdn.examgoal.net/fly/@width/image/1ldl4jjxi/dd2f58cc-ec3a-4ed8-b254-288d6b55ffb1/a7ceeb70-a1e2-11ed-86df-09b64f1bed76/file-1ldl4jjxj.png?format=png)
![NEET 2022 Phase 2 Chemistry - Some Basic Concepts of Organic Chemistry Question 18 English Option 4](https://app-content.cdn.examgoal.net/fly/@width/image/1ldl4k04e/a8bed3a9-50f6-472f-9c00-ce59468ddb88/b450abe0-a1e2-11ed-86df-09b64f1bed76/file-1ldl4k04f.png?format=png)