How will you distinguish between the following pairs of alcohols by a chemical test?
`CH_(2)=CHCH_(2)OH and CH_(2)=CH-CH_(2)CH_(2)OH`

Explanation

To distinguish between the two alcohols, `CH2=CHCH2OH` (which is an allylic alcohol) and `CH2=CH-CH2-CH2OH` (which is not an allylic alcohol), we can use Lucas reagent as a chemical test. Here’s a step-by-step solution:

### Step 1: Identify the Alcohols
- The first alcohol, `CH2=CHCH2OH`, is an allylic alcohol because the hydroxyl group (-OH) is attached to a carbon adjacent to the carbon-carbon double bond.
- The second alcohol, `CH2=CH-CH2-CH2OH`, is a primary alcohol since the -OH group is attached to a terminal carbon that is not adjacent to the double bond.

### Step 2: Prepare Lucas Reagent
- Lucas reagent is prepared by mixing zinc chloride (ZnCl2) with concentrated hydrochloric acid (HCl). This reagent is used to test the reactivity of alcohols.
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