Consider the following reactions of three unknown metals X, Y and Z.

\({\rm{2XN}}{{\rm{O}}_3}{\rm{(aq)}} + {\rm{Y(s)}} \to 2{\rm{X(s)}} + {\rm{Y(N}}{{\rm{O}}_3}{)_2}{\rm{(aq)}}\)

\({\rm{Y(N}}{{\rm{O}}_3}{)_2}{\rm{(aq)}} + {\rm{Z(s)}} \to\) No reaction

\(2{\rm{XN}}{{\rm{O}}_3}{\rm{(aq)}} + {\rm{Z(s)}} \to 2{\rm{X(s)}} + {\rm{Z(N}}{{\rm{O}}_3}{)_2}{\rm{(aq)}}\)

What is the order of increasing reactivity of the metals (least reactive first)?

A.     \({\text{X}} < {\text{Y}} < {\text{Z}}\)

B.     \({\text{X}} < {\text{Z}} < {\text{Y}}\)

C.     \({\text{Z}} < {\text{Y}} < {\text{X}}\)

D.     \({\text{Y}} < {\text{Z}} < {\text{X}}\)

B