Assertion (A) It is necessary to avoid traces of moisture from Grignard reagent.Reason (R) Grignard reagent reacts with water and forms hydrocarbon.Codes:

Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation for Assertion (A).

Explanation:

Grignard reagents are extremely reactive and can react with even a small amount of moisture in the air. The reaction between a Grignard reagent and water results in the formation of a hydrocarbon and magnesium hydroxide. This is why it is necessary to avoid traces of moisture when working with Grignard reagents. If moisture is present, it will react with the Grignard reagent, reducing its effectiveness. Therefore, Grignard reagents are typically prepared and used under anhydrous (dry) conditions.