A) presence of two \[N{{O}_{2}}\] groups in the ring makes 2, 4-dinitrophenol a stronger acid than phenol
B) presence of two \[N{{O}_{2}}\] groups in the ring makes 2, 4-dinitrophenol a weaker acid than phenol
C) presence of two \[N{{O}_{2}}\] groups make the hydrogen bonding easier, making 2, 4-dinitrophenol soluble
D) nitro group reacts with \[N{{a}_{2}}C{{O}_{3}}\] while OH group does not.
Correct Answer: A
Solution :
Presence of two electron withdrawing -\[N{{O}_{2}}\] groups in the ring makes 2, 4-dinitrophenol a stronger acid than phenol. Hence, it reacts with aqueous \[N{{a}_{2}}C{{O}_{3}}\] solution to form sodium salt thus making it soluble in \[N{{a}_{2}}C{{O}_{3}}\].
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