Chemistry-13 Redox reaction preview

What is the oxidation state of sulfur in H₂S?

• -3

• -1

• -2

• +2

Answer explanation

H is +1, the whole compound should be 0.

Tags

NGSS.HS-PS1-2

The oxidation state of nitrogen in Li₃N is ____.

• +3

• +5

• -3

• -2

Answer explanation

Li is +1, the whole compound should be 0.

Tags

NGSS.HS-PS1-2

Indicate the oxidation number of phosphorus in H₃PO₂

• -1

• +1

• +2

• +4

Answer explanation

H is +1, O is -2, the whole compound should be 0.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of Fe in FeO?

• +2

• -2

• 0

• +1

Answer explanation

O is -2, the whole compound should be 0.

Tags

NGSS.HS-PS1-1

What substance is oxidized in the following reaction?
4Fe + 3O₂ --> 2Fe₂O₃

• Iron
• Fluorine
• Oxygen

Tags

NGSS.HS-PS1-2

Substance that oxidizes another substance by accepting its electrons.

• reducing agent

• oxidation number

• combustion

• oxidizing agent

Tags

NGSS.HS-PS1-2

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

• Oxidized
• Reduced
• Neutralized
• Precipitated

Tags

NGSS.HS-PS1-2

Reduction involves 

• gaining electrons; 
• losing electrons; 

Tags

NGSS.HS-PS1-2

Which of the following is the product of the reaction of aluminium and oxygen?

• aluminium oxide.
• metal oxide
• aluminium ore
• aluminium and oxygen

Tags

NGSS.HS-PS1-2

Which of the following represents a balanced equation?

• 2N₂ + O₂ -> N₂O

• S₈ + 12O₂ -> 8SO₃

• H₂ + O₂ -> 2H₂O

• H₃PO₄ -> H₄P₂O₇ + H₂O

Tags

NGSS.HS-PS1-7