(A) The acidity of alcohols follows the order `1^(@) gt 2^(@) gt 3^(@)`.
(R ) The `+I` effect of alkyl groups `(3^(@) gt 2^(@) gt 1^(@))` favours the dissociation of `-O-H` group.

Options

A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).
B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).
C. If (A) is correct but (R ) is incorrect
D. If (A) is incorrect but (R ) is correct.

Answer

To solve the question regarding the acidity of alcohols and the effect of alkyl groups, we will analyze both statements provided:

### Step 1: Understand the acidity order of alcohols
The first statement claims that the acidity of alcohols follows the order:
\[ 1^{\circ} > 2^{\circ} > 3^{\circ} \]

**Explanation**:
- 1° alcohols (primary alcohols) have one alkyl group attached to the carbon bearing the -OH group.
- 2° alcohols (secondary alcohols) have two alkyl groups.
- 3° alcohols (tertiary alcohols) have three alkyl groups.

As the number of alkyl groups increases, the electron-donating (+I) effect of these groups increases, which stabilizes the alcohol but decreases its acidity.

### Step 2: Analyze the +I effect of alkyl groups
The second statement claims that the +I effect of alkyl groups follows the order:
\[ 3^{\circ} > 2^{\circ} > 1^{\circ} \]

**Explanation**:
- The +I effect refers to the electron-donating ability of alkyl groups. Tertiary alcohols have the highest +I effect due to the presence of three alkyl groups, followed by secondary and then primary alcohols.

### Step 3: Relate +I effect to acidity
The acidity of alcohols is inversely related to the +I effect. This means that as the +I effect increases, the acidity decreases.

**Conclusion**:
- Since 1° alcohols have the least +I effect, they are the most acidic. Conversely, 3° alcohols, with the highest +I effect, are the least acidic.

### Step 4: Evaluate the statements
- **Statement A**: "The acidity of alcohols follows the order \( 1^{\circ} > 2^{\circ} > 3^{\circ} \)" is **correct**.
- **Statement B**: "The +I effect of alkyl groups \( 3^{\circ} > 2^{\circ} > 1^{\circ} \) favors the dissociation of -OH group" is **incorrect** because the +I effect actually reduces acidity.

### Final Answer:
- Statement A is true, and Statement B is false.

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