The alcohol which does not give a stable compound on dehydration is

How many isomers of $C_5H_{11}OH$ will be primary alcohols?

For the following reaction,select the statement that best describes the change.
$RCH_2OH + PCC [ C_5H_5NH^{+} ClCrO_3^- ] \to$

What is the product obtained from the following reaction?

Which of the following is incapable of showing the iodoform test?

$A$ hydroxy compound $(X)$ with molar mass $122 \ g \ mol^{-1}$ is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained has a molar mass of $290 \ g \ mol^{-1}$. The number of hydroxyl groups present in compound $(X)$ is :