JEE Main 2025 (24 Jan Shift 2)

Consider a complex reaction taking place in three steps with rate constants $k_1,k_2$ and $k_3$ respectively. The overall rate constant $k$ is given by the expression $k=\sqrt{\frac{k_1k_3}{k_2}}$. If the activation energies of the three steps are $60,30$ and $10\ kJ\ mol^{-1}$ respectively, then the overall energy of activation in $kJ\ mol^{-1}$ is ....... (Nearest integer)

The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ......

The hydrocarbon $(X)$ with molar mass $80\ g\ mol^{-1}$ and $90\%$ carbon has ...... degree of unsaturation.