318316
Which of the following is not a meta-directing group?
1 \(\mathrm{SO}_{3} \mathrm{H}\)
2 \(\mathrm{NO}_{2}\)
3 \(\mathrm{CN}\)
4 \(\mathrm{NH}_{2}\)
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318317
Which of the following is formed as the major product when toluene (excess) reacts with \(\mathrm{CH}_{3} \mathrm{Cl}\) at \(80^{\circ} \mathrm{C}\) in the presence of \(\mathrm{AlCl}_{3}\) ?
1 o-Xylene
2 p-Xylene
3 m-Xylene
4 Ethylbenzene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318318
Which of the following compounds will not undergo Friedel-Crafts reaction easily?
1 Xylene
2 Nitrobenzene
3 Toluene
4 Cumene
Explanation:
\(\mathrm{NO}_{2}\) group is meta-directing and deactivates ring for further substitution. It is an electron-with drawing group.
CHXI13:HYDROCARBONS
318319
In electrophilic aromatic substituion reaction, the nitro group is meta directing because it
1 decreases electron density at meta position
2 increases electron density at meta position
3 increases electron density at ortho and para positions
4 decreases electron density at ortho and para positions.
Explanation:
The directive influence of \(-\mathrm{NO}_{2}\) as an electrophile in electrophilic aromatic substitution is due to the \(-\mathrm{I}\) effect or electron withdrawing effect of \(-\mathrm{NO}_{2}\), and can be explained on the basis of the resonating structures obtained by the attack of the group on the benzene ring: The substituent, i.e., \(-\mathrm{NO}_{2}\) withdraws electrons from O- and P- positions Thus, m-position becomes a point of relatively high electron density and further substitution by electrophile occurs at m-position.
318316
Which of the following is not a meta-directing group?
1 \(\mathrm{SO}_{3} \mathrm{H}\)
2 \(\mathrm{NO}_{2}\)
3 \(\mathrm{CN}\)
4 \(\mathrm{NH}_{2}\)
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318317
Which of the following is formed as the major product when toluene (excess) reacts with \(\mathrm{CH}_{3} \mathrm{Cl}\) at \(80^{\circ} \mathrm{C}\) in the presence of \(\mathrm{AlCl}_{3}\) ?
1 o-Xylene
2 p-Xylene
3 m-Xylene
4 Ethylbenzene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318318
Which of the following compounds will not undergo Friedel-Crafts reaction easily?
1 Xylene
2 Nitrobenzene
3 Toluene
4 Cumene
Explanation:
\(\mathrm{NO}_{2}\) group is meta-directing and deactivates ring for further substitution. It is an electron-with drawing group.
CHXI13:HYDROCARBONS
318319
In electrophilic aromatic substituion reaction, the nitro group is meta directing because it
1 decreases electron density at meta position
2 increases electron density at meta position
3 increases electron density at ortho and para positions
4 decreases electron density at ortho and para positions.
Explanation:
The directive influence of \(-\mathrm{NO}_{2}\) as an electrophile in electrophilic aromatic substitution is due to the \(-\mathrm{I}\) effect or electron withdrawing effect of \(-\mathrm{NO}_{2}\), and can be explained on the basis of the resonating structures obtained by the attack of the group on the benzene ring: The substituent, i.e., \(-\mathrm{NO}_{2}\) withdraws electrons from O- and P- positions Thus, m-position becomes a point of relatively high electron density and further substitution by electrophile occurs at m-position.
318316
Which of the following is not a meta-directing group?
1 \(\mathrm{SO}_{3} \mathrm{H}\)
2 \(\mathrm{NO}_{2}\)
3 \(\mathrm{CN}\)
4 \(\mathrm{NH}_{2}\)
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318317
Which of the following is formed as the major product when toluene (excess) reacts with \(\mathrm{CH}_{3} \mathrm{Cl}\) at \(80^{\circ} \mathrm{C}\) in the presence of \(\mathrm{AlCl}_{3}\) ?
1 o-Xylene
2 p-Xylene
3 m-Xylene
4 Ethylbenzene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318318
Which of the following compounds will not undergo Friedel-Crafts reaction easily?
1 Xylene
2 Nitrobenzene
3 Toluene
4 Cumene
Explanation:
\(\mathrm{NO}_{2}\) group is meta-directing and deactivates ring for further substitution. It is an electron-with drawing group.
CHXI13:HYDROCARBONS
318319
In electrophilic aromatic substituion reaction, the nitro group is meta directing because it
1 decreases electron density at meta position
2 increases electron density at meta position
3 increases electron density at ortho and para positions
4 decreases electron density at ortho and para positions.
Explanation:
The directive influence of \(-\mathrm{NO}_{2}\) as an electrophile in electrophilic aromatic substitution is due to the \(-\mathrm{I}\) effect or electron withdrawing effect of \(-\mathrm{NO}_{2}\), and can be explained on the basis of the resonating structures obtained by the attack of the group on the benzene ring: The substituent, i.e., \(-\mathrm{NO}_{2}\) withdraws electrons from O- and P- positions Thus, m-position becomes a point of relatively high electron density and further substitution by electrophile occurs at m-position.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXI13:HYDROCARBONS
318316
Which of the following is not a meta-directing group?
1 \(\mathrm{SO}_{3} \mathrm{H}\)
2 \(\mathrm{NO}_{2}\)
3 \(\mathrm{CN}\)
4 \(\mathrm{NH}_{2}\)
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318317
Which of the following is formed as the major product when toluene (excess) reacts with \(\mathrm{CH}_{3} \mathrm{Cl}\) at \(80^{\circ} \mathrm{C}\) in the presence of \(\mathrm{AlCl}_{3}\) ?
1 o-Xylene
2 p-Xylene
3 m-Xylene
4 Ethylbenzene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318318
Which of the following compounds will not undergo Friedel-Crafts reaction easily?
1 Xylene
2 Nitrobenzene
3 Toluene
4 Cumene
Explanation:
\(\mathrm{NO}_{2}\) group is meta-directing and deactivates ring for further substitution. It is an electron-with drawing group.
CHXI13:HYDROCARBONS
318319
In electrophilic aromatic substituion reaction, the nitro group is meta directing because it
1 decreases electron density at meta position
2 increases electron density at meta position
3 increases electron density at ortho and para positions
4 decreases electron density at ortho and para positions.
Explanation:
The directive influence of \(-\mathrm{NO}_{2}\) as an electrophile in electrophilic aromatic substitution is due to the \(-\mathrm{I}\) effect or electron withdrawing effect of \(-\mathrm{NO}_{2}\), and can be explained on the basis of the resonating structures obtained by the attack of the group on the benzene ring: The substituent, i.e., \(-\mathrm{NO}_{2}\) withdraws electrons from O- and P- positions Thus, m-position becomes a point of relatively high electron density and further substitution by electrophile occurs at m-position.
