MCQ 11 Mark
In the following questions a statement of assertion $(A)$ followed by a statement of reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : Toluene on Friedal Crafts methylation gives $o–$ and $p–$ xylene.
Reason $(R)$ : $\text{CH}_3-$ group bonded to benzene ring increases electron density at $o–$ and $p–$ position.
Assertion $(A)$ : Toluene on Friedal Crafts methylation gives $o–$ and $p–$ xylene.
Reason $(R)$ : $\text{CH}_3-$ group bonded to benzene ring increases electron density at $o–$ and $p–$ position.
- ✓Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
- BBoth $A$ and $R$ are correct but $R$ is not the correct explanation of $A$.
- CBoth $A$ and $R$ are not correct.
- D$A$ is not correct but $R$ is correct.
Answer
View full question & answer→Correct option: A.
Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$.
Toluene has $ -\text{CH}_3$ group attached to benzene ring. $\text{CH}_3$ group is electron withdrawing group which activates benzene ring due to hyperconjugation effect, and increases electron density on ortho and para position for the attack of electrophiles.
