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Q5. D

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10e

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Q2: B

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4.b

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Q3. D

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7a. 6
7b. For the benzene to undergo substitution reaction, it requires Lewis acid to react with the Br₂. As for cyclohexene, the carbon double bond are broken with addition of Br₂, without any additional compounds.

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Q1. A

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In order: 2, 1, 3
1 and 3 are more reactive than 2 because they are connected to a nitrogen atom which has lone pair that is electron donating, hence it increases electron density of the respective benzene rings and increases reactivity of aromatic ring towards attack of electrophile.
1 is less reactive than 3 because the nitrogen atom connected to 1 is also linked to a C=O which is highly electronegative, largely pulling the lone pair of electrons on N atom towards itself, causing the lone pair to be less available to benzene ring 1.

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Q5. D

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10. (a), (e)

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Q4. B

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Q10d

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1) A

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Ans: 2<1<3
2 has the slowest reaction because it is connected to a carbon tom which is an EWG which will decrease electron density in the benzene ring and leads to less reactivity towards electrophilic aromatic substitution. On the other hand, 1 & 3 has faster reaction than 2 because it is connected to N atom which is a strongly activated EDG. A strongly activated EDG increases electron density in the benzene ring and also more reactive towards electrophilic aromatic substitutio

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Q10a)

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Question 10c)

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8a. 6
8b. As the benzene ring is very stable because of delocalised electrons, it will undergo substitution to maintain stability

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3) D