Calculate number of molecules present in 5.4 g of urea (Molar mass of urea $=60 \mathrm{~g} \mathrm{~mol}^{-1}$ )

The common name of Benzene-1,2-diol is

The solubility product of salt $\mathrm{B}_2 \mathrm{~A}$ is $3.2 \times 10^{-11}$ at 298 K . What is solubility of the salt at same temperature?

Identify the product formed when Hex-3-enenitrile is reduced with diisobutylaluminium hydride followed by acid hydrolysis?