Which of the following vapours passed over heated copper to form acetone?

Which of the following alcohols will undergo dehydration most easily?

In the following reaction sequence,$CH_3CH_2OH$ $\xrightarrow{P + I_2} A$ $\xrightarrow[\text{dry ether}]{Mg} B$ $\xrightarrow{HCHO} C$ $\xrightarrow{H_2O} D$,the compound $D$ is:

An alcohol having molecular weight $74$ gives white turbidity with Lucas reagent within $5-10$ minutes. It reacts with sodium metal to give $Y$. $Y$ reacts with $CH_3-Br$ to give $Z$. $Z$ is:

Which of the following would undergo dehydration most readily?

What is the product formed when $Ethyl \ magnesium \ bromide$ reacts with $Methanol$?