A : Ethanol undergoes haloform reaction.
R : Ethanol can be oxidised into ethanal.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).

Answer

To solve the assertion and reason question regarding ethanol and its reactions, we can break it down into the following steps:

### Step 1: Understand the Assertion
The assertion states that "Ethanol undergoes haloform reaction." The haloform reaction typically involves the reaction of methyl ketones or certain alcohols with halogens in the presence of a strong base, leading to the formation of haloforms (like iodoform or chloroform).

### Step 2: Identify the Conditions for Haloform Reaction
For a compound to undergo a haloform reaction, it must have a methyl ketone structure or an alcohol that can be oxidized to a methyl ketone. Ethanol (C2H5OH) can be oxidized to ethanal (acetaldehyde, CH3CHO), which is a methyl ketone.

### Step 3: Analyze the Reason
The reason states that "Ethanol can be oxidized into ethanal." This is true, as ethanol can indeed be oxidized to ethanal using weak oxidizing agents like NaOI or PCC.

### Step 4: Relate Assertion and Reason
While both the assertion and reason are true, the reason does not explain why ethanol undergoes a haloform reaction. The haloform reaction is specifically related to the presence of a methyl ketone, which is formed from the oxidation of ethanol, but the assertion does not directly depend on the oxidation process itself.

### Step 5: Conclusion
Both statements are true, but the reason is not the correct explanation for the assertion. Therefore, the correct option would be that both assertion and reason are true, but the reason is not the correct explanation of the assertion.

### Final Answer
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

---