Which of the following statements regarding the procedures used in the grignard lab exercise are true?
a) while preparing the grignard reagent , the top of the reflux column and addition funnel should be left open to the atmosphere during the reaction. b) all glassware used in the grignard preparation should be cleaned by rinsing with acetone just before assembling the reaction apparatus. c) when preparing the grignard reagent, the cooling water on the reflux condenser need not be turned on as soon as the reaction (ebullition) starts. d) all glassware used in the grignard preparation should be carefully dried in an oven before use.