The correct order of strength of acidity of the following compounds is:

(ii) > (i) > (iii) > (iv)

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(i) > (ii) > (iii) > (iv)

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(iv) > (iii) > (ii) > (i)

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(iv) > (iii) > (i) > (ii)

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Solution

The correct option is C (iv) > (iii) > (i) > (ii)
Presence of electron withdrawing groups such as nitro group enhance the acidic strength of phenol and the presence of electron releasing groups such as alkyl group decreases the acidic strength of phenol.

As $N O_{2}$ shows $- R$ effect so increases acidity while $C H_{3}$ shows +I effect, hence decreases acidity.

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Similar questions

Mark the correct order of decreasing acid strength of the following compounds.

(a) V > IV > II > I > III
(b) II > IV > I > III > V
(c) IV > V > III > II > I
(d) V > IV > III > II > I

Q. The decreasing order of acidity of the following compounds is:

In the following molecules:
$B F_{3}, B C l_{3}, B B r_{3}, B I_{3} I, I I, I I I, I V$
The correct order of Lewis acidic strength will be:

Q. Predict the correct order of

- I

strength for the following groups:

I . - C H_{2} N H_{2} I I . - C H = N H I I I . - C N

Q. Make the correct order of decreasing acid strength of the following compounds.

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