46. Consider the four hypothetical metals $\mathrm{W}, \mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ and their corresponding nitrate solutions were inserted into $\mathrm{X}\left(\mathrm{NO}_{3}\right)_{2}$ and $\mathrm{Z}\left(\mathrm{NO}_{3}\right)_{2}$ solutions: \[ \begin{array}{l} W_{(s)}+X_{(Q q)} \rightarrow X_{(s)}+W^{2+}(Q q) \\ Y_{(s)}+Z_{(\infty)}^{2+} \rightarrow Z_{(s)}+Y_{(\infty)}^{2+} \\ Y_{(s)}+X_{(\Delta)}^{2+} \rightarrow \text { no reaction } \\ W_{(s)}+Z_{(a q)}^{2+} \rightarrow Z_{(s)}+W_{(a q)}^{2+} \\ \end{array} \] The metallic ions, in order of decreasing ease of reduction (easiest to reduce first) are 47. Consider the four hypothetical metals $\mathrm{W}, \mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$. The following observations were made when $\mathrm{Y}$ and $W$ were inserted into $\mathrm{X}\left(\mathrm{NO}_{3}\right)_{2}$ and $\mathrm{Z}\left(\mathrm{NO}_{3}\right)_{2}$ solutions \[ \begin{array}{l} Y_{(s)}+X_{(2+4)}^{2+} \rightarrow \text { no reaction } \\ W_{(s)}+Z_{(+\infty)}^{2+} \rightarrow Z_{(s)}+W_{(\alpha)}^{2+} \\ \end{array} \] The best reducing agent is a. $Z_{(s)}$ b. $W_{(s)}$ d. $X_{(s)}$ c. $Y_{(e p)}^{2+}$ e. $z^{2+}(e)$ 48. Winich of the following statements are true for all electric ceils? I. electrons flow from the anode to the cathode II. reduction occurs at the anode III. oxidation occurs at the cathode IV. oxidation occurs at the anode V radirction ncrure at the eathode a. I, IV and V d. $I V$ and $V$ b. I, II and III e. I and III c. II and III

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