(Quiz) Redox Reaction and Electrochemistry

Multiple Choice

What is the oxidation number of nitrogen in HNO₃ ?

• -5

• -4

• +3

• +4

• +5

Multiple Choice

For the half reaction below, Cr is ....

Fe²⁺ + Cr₂O₇^2-   $$\rightarrow$$    Fe³⁺ + Cr³⁺

• Reduced

  (it loses electrons)

• Reduced

  (it gains electrons)

• Oxidized

  (it loses electrons)

• Oxidized

  (it gains electrons)

Multiple Choice

Predict the correct expression for the electrochemical cell:

• a

• b

• c

• d

• e

Multiple Choice

Which one is the best reducing agent?

• Ca

• Sr

• Li

• Na

• Ba

Multiple Choice

Which one will proceed spontaneously reaction?

• Zn+MgSO₄ → ZnSO₄ + Mg

• Mg + ZnSO₄ → MgSO₄ + Zn

Open Ended

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