Preparations of ketones

Why is Grignard reagent not successful in the preparation of ketones from acid chlorides?

Which of the following reaction(s) is/are correct regarding the preparation of ketone?

Preparation Of Aldehyde & Ketones|Preparation Of Aldehyde|Preparation Of Ketones|Summary

Methods Of Preparation Of Ketones|Questions|Physical Properties|Summary

Reduction|Questions|Preparation Of Aldehydes|Preparation Of Ketones|Physical Properties|Summary

Which one of the following is the intermediate in the preparation of a ketone by hydration of an alkyne in the presence of sulfuric acid and mercury (II) sulphate?