Electrochemistry Review

What is oxidation number of Cr in Cr₂O_7^2-?

• -2
• +2
• +6
• +12

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is oxidation number of Fe in FeO ?

• +2
• -2
• 0
• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which substance is reduced in the following reaction? 
NaOH + Li --> LiOH + Na

• Li
• Na
• O
• H

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is the balanced half - reaction for the oxidation of Cu to Cu^2+?

• Cu --> Cu²⁺

• Cu + 2 e^- --> Cu²⁺

• Cu --> Cu²⁺ + 2 e^-

• Cu - 2e^- --> Cu²⁺

Tags

NGSS.HS-PS1-7

In the reaction
2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

• Reduced
• Synthesized
• Oxidized
• None of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In electrolytic cell, anode will attract...

• Cations
• Anions

The process in which electrical energy is used to bring about a chemical change

• fuel cell
• battery
• electrolysis
• voltaic cell

Tags

NGSS.HS-PS2-5

An electrochemical cell that is used to convert chemical energy into electrical energy

• electrolysis
• electrode
• voltaic cell
• anode

Tags

NGSS.HS-PS2-5

The electrode at which reduction occurs

• cathode
• anode
• salt bridge
• electrode

Tags

NGSS.HS-PS2-5

Which ion can be most easily oxidized

• copper +2
• zinc +2
• iron +2
• calcium +2

Tags

NGSS.HS-PS1-1