Correct order of reactivity of following compounds towards Grignard reagent.

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III

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III

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III

>

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>

III

>

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Solution

The correct option is B II $>$ I $>$ III
Aldehydes are more reactive than ketones towards Grignard Reagents due to less steric hindrance. Grignard Reagents attacks if the bulkiness is low.

So, $H C H O A l d e h y d e ⟶ L e s s B u l k y > C H_{3} C H O A l d e h y d e > C H_{3} - C O - p h K e t o n e$

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Correct order of reactivity of following compounds towards Grignard reagent.

The correct option is B II > I > IIIAldehydes are more reactive than ketones towards Grignard Reagents due to less steric hindrance. Grignard Reagents attacks if the bulkiness is low. So, HCHOAldehyde⟶LessBulky>CH3CHOAldehyde>CH3−CO−phKetone