Chemistry - Complete Pblock- Question with Solution | TestHub

B is balanced and yields cobalt metaborate. D is the hydrolysis of $\mathrm{BC}{\mathrm{l}}_3$. A is atom-balanced but does not give the supplied reaction product; the supplied solution instead gives ${\mathrm{B}}_2{\mathrm{O}}_3+{\mathrm{P}}_2{\mathrm{O}}_5⟶2BP{\mathrm{O}}_4$. The source PDF gives option C as ${\mathrm{H}}_3\mathrm{B}{\mathrm{O}}_3+3HF⟶2B{\mathrm{F}}_3+3{\mathrm{H}}_2\mathrm{O}$, which is not balanced: one B on the left, two B on the right. The one-boron form in the question is corrected to ${\mathrm{H}}_3\mathrm{B}{\mathrm{O}}_3+3HF⟶\mathrm{B}{\mathrm{F}}_3+3{\mathrm{H}}_2\mathrm{O}$, preserving the intended option and the supplied answer.