Q-The dissolution of NH4Cl in water is endothermic even though NH4Cl dissolves in water spontaneously. Which one of the following best explains this behaviour ?
(a)The bonds in solid NH4Cl are weak.
(b) The entropy driving force causes dissolution.
(c) Endothermic processes are energetically favourable.
(d) The dissolving process is unrelated to energy.
(PLZ EXPLAIN THE ANSWER)