Hi,
When H+ ion is removed from phenol and nitrophenol , negative charge is generated on the ring. This negative charge delocalizes on the ring which is called phenomenon of resonance.
More the resonance contributer more the stability of anion. In case of p-nitro phenol you get extra resonating structure which stabilizes the negative charge. There for it is more easy for p-nitrophenol to loose H+ than phenol. Hence p- nitrophenol is more acidic.
So correct option will be 2.
Hope you find this understandable.
Question : Law of Demand violations include:
Option 1: Substitution effect is negative
Option 2: Income effect is negative
Option 3: Negative income effect is less than substitution effect
Option 4: Negative income effect is greater than substitution effect
Question : The ionisation energy of nitrogen is greater than that of oxygen because nitrogen has:
Option 1: high bond dissociation energy
Option 2: smaller atomic radius
Option 3: half-filled P-orbitals
Option 4: high nuclear charge
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