Arrange the following in decreasing order of acidic character--
(a)4-chloro phenol
(b)4-methyl phenol
(c)4-nitro phenol
(d)4-methoxy phenol
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Answer is 4 methoxy phenol
Decreasing order of more the electronegativity more will be with more acidic strength
Explanation:Order is as follows
(d)>(c)>(b)>(a)
- Here methoxy group is electron-withdrawing groups which effect more than nitro group,
- Therefore d) is more acidic than (c)
- In phenols, the electron releasing group decrease the acidity but the presence of electron- withdrawing group will increase acidity due to the presence of the methyl group it is more acid than chloro group
- so (b) is greater than (a)
- the correct order of acidic character is (d)>(c)>(b)>(a)
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