Question

Grignard reagent produces alkane if reacts with
(1).Phenol
(2).Carboxylic acid
(3).Amine
(4).All of these

Answer 1

In this question remember that in order for Grignard reagent to produce alkane the compound mentioned in the options should ionize and give H+ ion in order to form alkane, use this information to approach the solution.

Complete answer:
We know that Grignard reagent produces alkane if react with (1)phenol because, as per hint phenol give it’s H+ easily then other respective group mentioned as well as carboxylic group is a strong acid where Grignard’s reagent is a strong base therefore, they form salt and water when react also (3)amine can produce alkane when react with Grignard’s reagent but here Mg (NH)-X, but phenol when react with Grignard’s reagent it dissociate into H+ and OH- to form alkane and Mg(OH)-X.

Hence, option 1 and 3 are the correct option.

Note:
In the above solution we came to the conclusion that Grignard reagent will produce alkane when react with phenol and amine but not with carboxylic acid so in order to come to this conclusion we had the knowledge about the reaction of Grignard reagent when it will react with the mentioned compounds and what will be result this helped us to clearly identify the correct option.