Which one is liquid at room temperature?

Explain the stereochemistry of $S_{N}2$ reaction with a suitable example.

Sodium ethoxide is a specific reagent for

Which of the following is likely to undergo racemization during alkaline hydrolysis?

Which of the following factors increases the rate of a unimolecular nucleophilic substitution $(S_N1)$ reaction?

Consider all the structural isomers with molecular formula $C_5H_{11}Br$. They are separately treated with $KOH$ $(aq)$ to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is . . . . . . .