An organic compound '$$\mathrm{A}$$' on reaction with $$\mathrm{PCl}_3$$ gives an alkyl chloride having formula $$\mathrm{C}_3 \mathrm{H}_7 \mathrm{Cl}$$. '$$\mathrm{A}$$' on oxidation with $$\mathrm{PCC}$$ forms an aldehyde having formula $$\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}$$. Identify '$$\mathrm{A}$$'.

Identify CORRECT decreasing order of solubilities of alcohols, alkanes and amines in water having comparable molar mass.

Identify the compound with highest acidic strength from following.

Which among the following compounds reacts fastly with $$\mathrm{HBr}$$ ?