QUESTION 11 Which of the following statements about corrosion is false? A. Patin

Question

QUESTION 11 Which of the following statements about corrosion is false? A. Patina is the layer of tamish that gives silver a richer appearance B The oxidation of most metals by oxygen is spontaneous C. Most metals will develop a thin oxide coating, which protects their intenal atoms from oxidation. D. A car exposed to the elements will rust faster in the Midwest than in Arizona. OE. All of these are true QUESTION 12 The anode in a voltaic cell and in an electrolytic cell is O A. the site of oxidation and of reduction, respectively OB. the site of oxidation in both cells C. the site of reduction and of oxidation, respectively O D positive in both cells O E. the site of reduction in both cells QUESTION 13 Which of the following reactions is possible at the anode of a galvanic cell? () C.Zr,2+ + Cu Zn+Cu2+ ) D. Zn + a2+ Zn2+ +Cu E. two of these QUESTION 14 Which of the following is the strongest oxidizing agent? 168 V MnO4" + 4H+ + 3e-MnO2 + 2H2O 12 + 2e-2" Zn2++ 20- Zn 0.76V B MnO4" o E. Mn02

Explanation / Answer

11. D>>>>answer
12. At anode oxidation reaction takes place in both voltaic and electrolytic cell.
    B. the site of oxidation in both cells.
13.in galvanic cell at anode oxidation reaction takes place.
A. Zn(s) -----> Zn^2+ (aq) + 2e^- >>>>answer
14.
    The reduction potential value is more for oxidizing agent
B. MnO4^-

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