question_answer

Which of the acids cannot be prepared by Grignard reagent [MH CET 2004]

A)                 Acetic acid          

B)                 Succinic acid

C)             Formic acid    

D)             All of these

Correct Answer: C

Solution :

           Formic acid cannot be prepared by Grignard?s reagent. Higher acids are prepared by the reaction of \[C{{O}_{2}}\] on Grignard?s reagent                                                                        \[\underset{\text{acid}}{\mathop{\overset{\overset{O\,\,\,}{\mathop{|\ |\,\,\,\,\,}}\,}{\mathop{R-C-OH}}\,}}\,+Mg(OH)X\]