Assertion:- H-COOH and `H-COOCH_(3)` are homologues.
Reason:- Homologues differ by atleast one `CH_(2)` unit.

Options

A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.
B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If Assertion is False but the Reason is True.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that H-COOH (formic acid) and H-COOCH₃ (methyl formate) are homologues.

**Hint:** Recall the definition of homologues in organic chemistry.

### Step 2: Analyze the Compounds
- H-COOH is formic acid, which has the molecular formula CH₂O₂.
- H-COOCH₃ is methyl formate, which has the molecular formula C₂H₄O₂.

**Hint:** Compare the molecular formulas of the two compounds.

### Step 3: Determine the Difference
To be homologues, two compounds must differ by at least one CH₂ unit in their molecular formula.

- The difference in the number of carbon atoms between H-COOH and H-COOCH₃ is not just one CH₂ unit; they are different functional groups as well.

**Hint:** Identify the functional groups present in both compounds.

### Step 4: Identify Functional Groups
- H-COOH has a carboxylic acid functional group (-COOH).
- H-COOCH₃ has an ester functional group (-COOCH₃).

**Hint:** Recall that homologues must have the same functional group.

### Step 5: Conclusion on Assertion
Since H-COOH and H-COOCH₃ belong to different functional groups (carboxylic acid vs ester), they cannot be considered homologues. Therefore, the assertion is **false**.

### Step 6: Understand the Reason
The reason states that homologues differ by at least one CH₂ unit. This statement is **true**.

### Final Conclusion
- Assertion: **False** (H-COOH and H-COOCH₃ are not homologues).
- Reason: **True** (Homologues differ by at least one CH₂ unit).

### Final Answer
Assertion is false, but the reason is true.

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