When ethanol is treated with sulphuric acid at $413 \ K$,the reaction involved in it is:

The boiling point of glycerol is higher than that of propanal because of:

Correct order of reactivity of the given alcohols towards the substitution with $(NaBr + H_2SO_4)$ is:

What is the product formed when neopentyl alcohol reacts with concentrated $HCl$ in the presence of $ZnCl_2$?

An alcohol $X$ $(C_4H_{10}O)$ on dehydration gives an alkene $(C_4H_8)$ as the major product,which on bromination followed by treatment with $Y$ gives an alkyne $C_4H_6$. The alkyne $C_4H_6$ does not react with sodium metal. What are $X$ and $Y$?

$CH_3-C(OH)(CH_3)-CH_3 \xrightarrow[cool]{Na_2Cr_2O_7} (P)$; Product $(P)$ in the reaction is