4.
In a series of chemical test reactions the following observations were made when several metallic eleÂment samples were treated with 3.00 M hydrochloric acid solution. Zn: metal dissolves, hydroÂgen gas is emitted. Cu: no reaction. Ag: no reaction. Mg: metal dissolves, hydrogen gas is emitted. Mn: metal dissolves, hydrogen gas is emitted. Which statement below is true?
A.
Mg, Mn, Zn are more reactive than Ag, Cu; but less reactive than H2.
B.
Mg, Mn, Zn are less reactive than Ag, Cu; but more reactive than H2.
C.
Mg, Mn, Zn are more reactive than Ag, Cu; and more reactive than H2.
D.
Mg, Mn, Zn are less reactive than Ag, Cu; and less reactive than H2.
E.
These observations are insufficient to form any judgment about relative reactivity of any of the elements tested.
my answer key states that the answer is B but im just confused why because according to the activity series of metals, Mg, Mn and Zn are more reactive than Cu and Ag
| 4. | In a series of chemical test reactions the following observations were made when several metallic eleÂment samples were treated with 3.00 M hydrochloric acid solution. Zn: metal dissolves, hydroÂgen gas is emitted. Cu: no reaction. Ag: no reaction. Mg: metal dissolves, hydrogen gas is emitted. Mn: metal dissolves, hydrogen gas is emitted. Which statement below is true? | |
| A. | Mg, Mn, Zn are more reactive than Ag, Cu; but less reactive than H2. | |
| B. | Mg, Mn, Zn are less reactive than Ag, Cu; but more reactive than H2. | |
| C. | Mg, Mn, Zn are more reactive than Ag, Cu; and more reactive than H2. | |
| D. | Mg, Mn, Zn are less reactive than Ag, Cu; and less reactive than H2. | |
| E. | These observations are insufficient to form any judgment about relative reactivity of any of the elements tested. | |
my answer key states that the answer is B but im just confused why because according to the activity series of metals, Mg, Mn and Zn are more reactive than Cu and Ag
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