Redox

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

What is the oxidation number of O in CO₂?

• +2
• -1
• +4
• -2

What is the oxidation number of Ca in Ca₃N₂?

• +3
• +2
• -3
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of S in SO₄^-2?

• -2
• +2
• +6
• -4

What is oxidation number of Cr in Cr₂O₇^-2?

• -2
• +2
• +6
• +12

What is oxidation number of P in K₃PO₄?

• +1
• +5
• -2
• 0

Tags

NGSS.HS-PS1-1

If an atom loses electrons during a chemical reaction, the atom has been:

• Oxidized
• Reduced

If in a reaction, copper is reduced; its number of electrons has:

• Increased
• Decreased
• Remained Constant
• Varies Randomly

A chemical reaction that involves a gain/loss of electrons is called:

• Double Replacement
• Neutralization
• Oxidation-Reduction
• Hydrolysis

Tags

NGSS.HS-PS1-2

What is oxidation number of H in CaH₂?

• +1
• -1
• 0
• +2

Tags

NGSS.HS-PS1-1