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

The oxidation number of nitrogen in N₂ is

• +1

• 0

• +3

• -3

What is oxidation number of P in K₃PO₄?

• +1
• +5
• -2
• 0

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

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

• Li
• Na
• O
• H

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

What is the oxidation number of Br in BrO₃^-1?

• +3
• -2
• +5
• +2

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

• Reduced
• Synthesized
• Oxidized
• None of the above