Dehydration of the above compound will give

Identify the major product of the following reaction:

What is the correct order of acidity for the following hydrocarbons?

The maximum number of bromine atoms present in the final product $P$ upon complete bromination is

The hottest region of the Bunsen flame shown in the figure below is:

The dibromo compound $[P]$ (molecular formula : $C_{9}H_{10}Br_{2}$) when heated with excess sodamide followed by treatment with dilute $HCl$ gives $[Q]$. On warming $[Q]$ with mercuric sulphate and dilute sulphuric acid yields $[R]$ which gives positive Iodoform test but negative Tollen's test. The compound $[P]$ is: