Select the statements below that are TRUE

(A)

Benzene and its derivatives undergo substitution reactions with electrophiles which involve the replacement of hydrogen atom. They do not show electrophilic aromatic addition reactions.

Part A

Benzene and its derivatives tend to undergo electrophilic aromatic addition reactions is a false statement.

Explanation

Aromatic compounds do not give electrophilic addition reactions, they only undergo electrophilic substitution reactions.

Step 2 of 6

(B)

Benzene and its derivatives undergo substitution reactions with electrophiles which involve the replacement of hydrogen atom. They do not show electrophilic aromatic addition reactions.

Part B

Benzene and its derivatives tend to undergo electrophilic aromatic substitution reactions is a true statement.

Explanation | Hint for next step

Aromatic compounds do not give electrophilic addition reactions, they only undergo electrophilic substitution reactions. Thus, statement B is true.

Step 3 of 6

(C)

The activation energy in case of substitution energy is very high. Because the activated complex in case of aromatic compounds has very high energy.

Part C

Substitution reactions have energy of activation that are very low, is a false statement.

Explanation | Hint for next step

In the substitution reactions of aromatic compounds, the activated complex has high energy, therefore the activation energy is usually high. Thus, statement C is false.

Step 4 of 6

(D)

Benzene ring has electron delocalization of 6 pi-electrons which makes them much more stable the dienes and alkenes.

Part D

Dienes and alkenes are much more stable than the benzene rings, is a false statement.

Explanation | Hint for next step

Benzene is an aromatic compound which has the electron cloud of 6 pi-electrons which delocalize continuously. Thus, statement D is false.

Step 5 of 6

(E)

Addition reactions involve the addition of an electrophile to the double bond which will actually break the continuous delocalization of benzene ring.

Part E

Addition reaction destroy the integrity of the benzene ring, is a true statement.

Explanation

The mechanism of addition reactions involves the addition of electrophiles to the double which can result in the discontinuity of the delocalization of pi-electrons in benzene ring. Thus, the statement E is true.

Step 6 of 6

(F)

An electrophilic substitution reactions of benzene ring involve the replacement of hydrogen atom with the electrophilic in order to give the substituted product and benzene is regenerated in the final stage of electrophilic substitution reactions.

Part F

Benzene and its derivatives undergo a type of substitution reaction in which a hydrogen atom is replaced by a substituent, but the stable aromatic benzene ring is regenerated at the end of the mechanism, is a true statement.

Explanation

The mechanism of electrophilic substitution reactions involves the replacement of hydrogen atom with the coming electrophile and regeneration of benzene ring in the end. Thus, statement F is true.

Answer

Part A

Benzene and its derivatives tend to undergo electrophilic aromatic addition reactions is a false statement.

Part B

Benzene and its derivatives tend to undergo electrophilic aromatic substitution reactions is a true statement.

Part C

Substitution reactions have energy of activation that are very low, is a false statement.

Part D

Dienes and alkenes are much more stable than the benzene rings, is a false statement.

Part E

Addition reaction destroy the integrity of the benzene ring, is a true statement.

Part F

Benzene and its derivatives undergo a type of substitution reaction in which a hydrogen atom is replaced by a substituent, but the stable aromatic benzene ring is regenerated at the end of the mechanism, is a true statement.