The formation of diethyl ether from ethanol is based on:

Which of the following isomers of $C_4H_9OH$ has the lowest boiling point?

$A$ compound $A$ on oxidation gives acetaldehyde,and further oxidation gives an acid. After the first oxidation,the product reacts with ammoniacal $AgNO_3$ to produce a silver mirror. Compound $A$ is likely to be:

The major product $(A)$ is:

The reagent used for the dehydration of an alcohol is

Which of the following hydroxy ethers gives a $+ve$ test with Tollen's reagent?