Redoxi

If an atom has an oxidation number of +4 on the reactant side of an equation and an oxidation number of -2 on the product side, this atom was

• oxidized.

• reduced.

• None of the above

If an atom has an oxidation number of -1 on the reactant side of an equation and an oxidation number of 0 on the product side, this atom was

• oxidized.

• reduced.

• None of the above

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

• Oxidized
• Reduced
• Neutralized
• Precipitated

Tags

NGSS.HS-PS1-2

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

• Increased
• Decreased
• Remained Constant
• Varies Randomly

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• Li
• Na
• O
• H

Tags

NGSS.HS-PS1-2

Is magnesium oxidized or reduced in the following reaction?

2MgO--> 2Mg + O₂

• Oxidized

• Reduced

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the follow reaction, what is the oxidation number of iodine on the reactant (left) side?

3IF₅ + 2Fe→ 2FeF₃ + 3IF₃

• -1

• +1

• -5

• +5

In the follow reaction, which atom is oxidized?
3IF₅ + 2Fe→ 2FeF₃ + 3IF₃

• Iodine (I)
• Fluorine (F)
• Iron (Fe)
• None, this is not a redox reaction

Tags

NGSS.HS-PS1-2

In the follow reaction, which atom is reduced?
Ca + 2HNO₃ → Ca(NO₃)₂ + H₂

• Calcium (Ca)
• Hydrogen (H)
• Nitrogen (N)
• None, this is not a redox reaction

Tags

NGSS.HS-PS1-2

In the following reaction, Ca(NO₃)₂ + 2KOH → Ca(OH)₂+ 2KNO₃,

• Ca is reduced and N is oxidized.

• Ca is oxidized and N is reduced.

• N is oxidized and H is reduced.

• This is not a redox reaction.