Chemistry - GOC Question with Solution | TestHub

In (A), S-H bond weaker than O-H bond. In (B), in $2^{\text{nd }}$ compound, $-{\mathrm{NO}}_2$ loses its resonance effect. In (C), in $2^{\text{nd }}$ compound due to less acidic due to more activating groups. In (D), $1^{\text{st }}$ compound is less basic due to steric effect and it is primary amine.