Oxidation and Reduction

Which process involves the transfer of electrons?

• double replacement

• neutralization

• oxidation-reduction

• sublimation

Tags

NGSS.HS-PS1-2

During an oxidation-reduction reaction, the number of electrons gained is

• equal to the number of electrons lost

• equal to the number of protons gained

• less than the number of electrons lost

• less than the number of protons gained

Tags

NGSS.HS-PS1-2

In a redox reaction, there is a conservation of

• mass, only

• charge, only

• both mass and charge

• neither mass nor charge

Tags

NGSS.HS-PS1-7

Which of the following correctly describes oxidation?

• A loss of protons.

• A gain of protons.

• A loss of electrons.

• A gain of electrons.

Which of the following correctly describes reduction?

• A loss of protons.

• A gain of protons.

• A loss of electrons.

• A gain of electrons.

Which change in oxidation number indicates oxidation?

• -1 to +2

• -1 to -2

• +2 to -3

• +3 to +2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which change in oxidation number indicates reduction?

• +2 to 0

• -2 to 0

• +1 to +3

• 0 to +2

Given the equation above, which species is oxidized?

• Al(s)

• Cu²⁺(aq)

• Al³⁺(aq)

• Cu(s)

Given the equation above, which species is reduced?

• Al(s)

• Cu²⁺(aq)

• Al³⁺(aq)

• Cu(s)

Given the equation above, electrons are transferred from

• Al³⁺ to Cu

• Cu to Al³⁺

• Al to Cu²⁺

• Cu²⁺ to Al