Which process involves the breaking of hydrogen bonds?

A.     ${\text{2HI(g)}} \to {{\text{H}}_{\text{2}}}{\text{(g)}} + {{\text{I}}_{\text{2}}}{\text{(g)}}$

B.     ${\text{C}}{{\text{H}}_{\text{4}}}{\text{(g)}} \to {\text{C(g)}} + {\text{4H(g)}}$

C.     ${{\text{H}}_{\text{2}}}{\text{(l)}} \to {{\text{H}}_{\text{2}}}{\text{(g)}}$

D.     ${\text{N}}{{\text{H}}_{\text{3}}}{\text{(l)}} \to {\text{N}}{{\text{H}}_{\text{3}}}{\text{(g)}}$

D

Many considered B, the breaking of C–H bonds, to be correct.