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Question
Mark the correct order of decreasing acid strength of the following compounds.
| (a) |  |
| (b) |  |
| (c) |  |
| (d) |  |
| (e) |  |
Options
e > d > b > a > c
b > d > a > c > e
d > e > c > b > a
e > d > c > b > a
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Solution
b > d > a > c > e
Explanation:
-NO2 is an electron-withdrawing group that increases the acidity of phenol and the effect is more pronounced at ortho and para positions. Similarly, the methoxy group is an electron releasing group that decreases the acidity of phenol and the effect is more pronounced at ortho and para positions.
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