Alcohols Phenols and Ethers - Result Question 35

####36. Among the following four compounds [2010] (i) phenol

(ii) methylphenol (iii) meta-nitrophenol

(iv) para-nitrophenol the acidity order is :

(a) ii $>$ i $>$ iii $>$ iv

(b) iv $>$ iii $>$ i $>$ ii

(c) iii $>$ iv $>$ i $>$ ii

(d) i $>$ iv $>$ iii $>$ ii

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Solution:

36.O=N+c1ccc(O)cc1O=N+c1cccc(O)c1

(iv)

( $-I$ and $-M$ effects, (only $-I$ effect) both increase acidity)Oc1ccccc1

(i)Cc1ccccc1O

(ii) (+ I effect of $CH_3$ group decreases acidity)

$\therefore$ Correct choice: (b)



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