Oxidation Reduction Chemistry

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

During which process does an atom gain one or more electrons?

• transmutation

• reduction

• oxidation

• neutralization

Tags

NGSS.HS-PS1-2

When a lithium atom forms an Li⁺ ion, the lithium atom

• gains a proton

• gains an electron

• loses a proton

• loses an electron

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

The oxidation number of nitrogen in N₂ is

• +1

• 0

• +3

• -3

Oxygen will have a positive oxidation number when combined with

• fluorine

• chlorine

• bromine

• iodine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The oxidation numbers of all the atoms in H₂SO₄ must add up to

• 0

• +5

• +9

• +16

Reduction happens at the 

• anode
• cathode
• salt bridge
• voltmeter