Which is more acidic para nitrophenol or para methoxyphenol?

Out of all these, para-nitro phenol will be the most acidic. This is because the nitro group has –R effect (electron withdrawing group) due to which the negative charge on the phenoxide conjugate base will get stabilised. Given below are the resonance structures for the para-methoxy phenol.

Which is more acidic Ortho-methoxyphenol or phenol?

The presence of this group in the ortho position in ortho nitro phenol decreases the electron density in the O−H bond. Thus, it increases the electron density in the O−H bond and hence, the proton cannot be given out easily. Hence, ortho-nitrophenol is more acidic than ortho-methoxyphenol.

Which is more acidic Ortho Methylphenol or para Methylphenol?

The acidic nature of the three nitrophenols increases in the order: meta < ortho < para.

Which is more acidic M methoxyphenol or P-methoxyphenol?

Correct explanation. Methoxy group exerts -1- effect at m-position and +R-effect at p-position, thereby making m-meyhoxyphenol a stronger acid than p-methoxyphenol.

Which is most acidic among the following?

Hence, among the given options, p-nitrophenol is the most acidic.

Which is more acidic Methylphenol or phenol?

Phenol is less acidic as compared to the above two because no electron withdrawing group is present and there is no inductive or resonance effect. Methyl phenol shows the electron donating inductive effect, hence it is least acidic among the following. So, the correct answer is “Option A”.

Which of the following is most acidic O methoxyphenol?

Ortho, because methoxy is a electron donating group . Hence o-methoxyphenol is more acidic then p-methoxyphenol. The reason is due to stabilisation of intermediate phenoxide ion.

Which is the strongest acid among the following aromatic compounds?

ortho-nitrophenol
ortho-nitrophenol takes part in hydrogen bonding which makes it less acidic than the para-nitrophenol. So para-nitrophenol is the strongest acid among the following aromatic compounds.

Which is the most acidic oxide among the following?

Therefore Cl2O7 is the most acidic oxide.

Why is ortho methoxyphenol less acidic than other methoxiphenol?

In ortho methoxyphenol, electron releasing methoxy group is present in ortho position, the electron density of O−H bond is increased. This makes removal of proton difficult. Hence, ortho methoxyphenol is less acidic. Answer verified by Toppr

Why is ortho nitrophenol a stronger acid than ortho-nitro phenol?

In ortho nitro phenol, electron withdrawing nitro group is present in ortho position, the electron density of O−Hbond is reduced. This makes removal of proton easy. After deprotonation, o-nitrophenoxide ion is resonance stabilized. Hence, ortho nitrophenol is a stronger acid.

Why is ortho isomer of methoxy benzoic acid more acidic than para-isomer?

Here consider +R of methoxy (-OCH3). Resonance is more effective or important than inductive effect. Ortho- is more acidic than para-isomer due to greater -I from ortho position but similar +R effect. Note- Similar order would be expected for methoxy benzoic acids however, Ortho effect makes ortho-isomer the strongest acid of all isomers.

Why is ortho-cresol more acidic than meta cresol?

Attaching an electron-donating group, such as methyl, to these positions destabilizes the phenoxide ion, and thus makes the phenol less acidic. This is exactly what we see above: ortho- and para-cresol have about the same pKa, while meta-cresol, in which the methyl group is attached to a neutral carbon, is more acidic (lower pKa).