Chemistry - Complete P-block Question with Solution | TestHub

Compound A is Phosphorus pentoxide (P₄O₁₀), confirmed by its hydration to H₃PO₄. P₄O₁₀ acts as a powerful dehydrating agent, reacting with acetamide (CH₃CONH₂) to produce methyl cyanide (CH₃CN). The structure of methyl cyanide (H₃C–C≡N) contains 5 $\sigma$ bonds (3 C–H, 1 C–C, 1 C–N) and 2$\pi$ bonds (in the triple bond). Therefore, the correct option is (C).