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JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES
1
Hard
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Analyzing
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Arrange the following carbonyl compounds in increasing order of their reactivity in nucleophilic addition reaction
i) Benaldehyde ii) P-Tolualdehyde
iii) P-Nitro benzaldehyde iv) Acetophenone
i) Benaldehyde ii) P-Tolualdehyde
iii) P-Nitro benzaldehyde iv) Acetophenone
View answer and explanation
Correct option: C
iv < ii < i < iii
The correct answer is C (iv < ii < i < iii) because electron-withdrawing groups increase reactivity in nucleophilic addition, and electron-donating groups decrease it.
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An alkyl halide reacts with metallic sodium in dry ether. The reaction is known as :
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Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass. Friedel-Craft’s reaction of bromobenzene with methyl iodide gives: