IV ------- V IV ----------- V 5) Which of the following substituents is an activ

Question

IV

-------

V

IV

-----------

V

5) Which of the following substituents is an activating group?

6) Which of the following statements is true regarding the two reactions shown below?   

Both reactions will yield ortho/para-substituted products. Reaction I will be faster than the nitration of benzene, while Reaction II will be slower.

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Both reactions will occur at a slower rate than the nitration of benzene. Reaction I will yield the meta-substituted product, and Reaction II will yield ortho/para-substituted products.

Explanation / Answer

Solution :-

Q1 ) The structure shown in the option l is the correct answer so the option l is correct because the there are 2 N are present in the ring which have the lone pair of electrons therefore the anion formed after leaving the Br is not stabilized

Q2) For the reaction shown in the question 2 when the benzene reacts with Br2, FeBr3 then it forms the bromobenzene which then reacts with Mg to form the Grignard reagent and then Grignard reagent reacts with CO2/H+ to form the carboxylic acid group so the correct structure for the product is the option lll

So the correct answer is option lll

Q3) for the reaction shown in the question 3

KMnO4 is the oxidizing agent which oxidizes the alkyle chain to the benzoic acid

The structure shown in the option lll contains the carbonyl group therefore it cannot be oxidized to benzoic acid

So the correct answer is option lll

Q4 ) For the Q4 reaction first step is the Fridal craft acylation of the benzene and then Zn HCl is used to reduce the carbonyl group to alkane chain so the correct structure for the product is as shown in the option v

So the correct answer is option V

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