Identify the major product obtained when anisole reacts with bromine in acetic acid.

Calculate the molality of nonvolatile solution if solution freezes at $-0.95^{\circ} \mathrm{C}$

$\left[K_f\right.$ for water, $=1.86 \mathrm{~K} \mathrm{~mol}^{-1}$, freezing point of water $=0^{\circ} \mathrm{C}$ ]

Which from following is the most stable species?

Half life of a first order reaction is 3 minute. What is the time required to reduce the concentration of reactant by $90 \%$ of its initial concentration?