Assertion :IPUAC name of compound is but-2-enal.Reason :functional group gets preference over multiple double bond in IUPAC name of a compound

Options

A. If both assertion and reason are correct and reason is crect explanation for assertion
B. If both assertion and reason are correct but reason is not cottect explanation for assertion
C. If reason is correct but assertion is incorrect
D. If both assertion and reason are incorrect

Answer

To solve the question regarding the assertion and reason related to the IUPAC name of a compound, we will analyze both statements step by step.

### Step 1: Understand the Assertion
The assertion states that the IUPAC name of the compound is but-2-enal.

- **Explanation**: But-2-enal is a compound that contains a double bond and an aldehyde functional group. The "but" indicates that the compound has four carbon atoms, "2-en" indicates that there is a double bond starting at the second carbon, and "al" indicates the presence of an aldehyde functional group.

### Step 2: Understand the Reason
The reason states that the functional group gets preference over multiple double bonds in the IUPAC naming of a compound.

- **Explanation**: In IUPAC nomenclature, functional groups take precedence over the position of multiple bonds when determining the base name of the compound. In this case, the aldehyde functional group (–CHO) is prioritized over the double bond (C=C) when naming the compound.

### Step 3: Analyze the Relationship Between Assertion and Reason
Both the assertion and the reason are correct. The name but-2-enal correctly reflects the structure of the compound, where the aldehyde functional group is given priority over the double bond.

### Conclusion
Since both the assertion and the reason are correct, and the reason correctly explains the assertion, the correct answer is:

**Option A**: Both assertion and reason are correct, and the reason is a correct explanation of the assertion.

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