A) \[NaHC{{O}_{3}}\]
B) \[NaOH\]
C) Na
D) Both (b) and (c)
Correct Answer: A
Solution :
Benzoic acid reacts with \[\text{NaHC}{{\text{O}}_{\text{3}}}\] to give effervescence due to the evolution of \[\text{C}{{\text{O}}_{2}}.\] \[{{C}_{6}}{{H}_{5}}COOH+NaHC{{O}_{3}}\xrightarrow{{}}{{C}_{6}}{{H}_{5}}COONa\] \[+{{H}_{2}}O+C{{O}_{2}}\] Phenol does not give effervescence. Phenol and benzoic acid cannot be distinguished by \[\text{NaOH}\] and Na because both can react with \[\text{NaOH}\] and Na.
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