Dehydration of an alcohol $(A)$ gives an alkene. Ozonolysis of one molecule of this alkene yields two molecules of acetaldehyde. Identify the alcohol $(A)$.

Given below are two statements:
Statement $(I)$: The boiling points of alcohols and phenols increase with an increase in the number of $C$ atoms.
Statement $(II)$: The boiling points of alcohols and phenols are higher in comparison to other classes of compounds such as ethers and haloalkanes.
In the light of the above statements,choose the correct answer from the options given below:

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

From amongst the following alcohols,the one that would react fastest with conc. $HCl$ and anhydrous $ZnCl_2$ is:

Which of the following reagents is used to convert ethyl alcohol into ethyl chloride?

What is the order of reactivity for the reaction ${{C}_{2}}{{H}_{5}}OH + HX \xrightarrow{Zn{{X}_{2}}} {{C}_{2}}{{H}_{5}}X + {{H}_{2}}O$?