Redox Reactions Review

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Which element was reduced in the reaction below?

Na + PbCl₂ → Pb + NaCl

• Na

• Pb

• Cl

• No element was reduced

Tags

NGSS.HS-PS1-2

Which of the following reactions is balanced by both mass and charge?

• Fe⁺² + Al →Fe + Al⁺³

• Cu + Fe⁺² → Cu⁺¹ + Fe⁺³

• F₂ + Br^- --> F^- + Br₂

• Fe⁺² + 2 Cu --> 2 Cu⁺ + Fe

Tags

NGSS.HS-PS1-7

An element's oxidation numbers remain the same during a reaction. What happened to that element?

• It was oxidized

• It was reduced

• It was both oxidized and reduced

• It was neither oxidized nor reduced

Tags

NGSS.HS-PS1-7

In the half equation: Cu --> Cu²⁺ + 2e^- Copper undergoes...

• Spectatorship

• Reduction

• Deprotonation

• Oxidation

Which is the incorrect statement about voltaic cells?

• Oxidation occurs at the cathode

• Electricity is produced as the result of spontaneous exothermic chemical reactions

• Reduction occurs at the cathode

• Voltaic cells are also called galvanic cells

What is the function of Y in cell below?

• To complete the circuit

• To allow flow of electrons between both cells

• To allow flow of ions 

• To connect both half cells

Reactions in voltaic cells are

• spontaneous, redox reactions

• non-spontaneous, redox reactions

• spontaneous, non-redox reactions

• non-spontaneous, non-redox reactions

During a redox reaction,

• the number of e- lost always equals the number of e- gained

• the number of e- lost is always more than the number of e- gained

• the number of e- lost is always less than equals the number of e- gained

• cannot tell

Choose the redox reaction from the image:

• A

• B

• C

• D

Tags

NGSS.HS-PS1-7