Oxidation and Reduction

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

• Iron

• Fluorine

• Oxygen

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Cl₂ + 2e- --> 2Cl ^- is an example of:

• a chemical reaction

• redox

• oxidation

• reduction

In the reaction Zn + H₂O --> ZnO₂ + H₂
 which element, if any, is oxidized? 

• Zinc

• Hydrogen

• Oxygen

• None

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

• Reduced

• Synthesized

• Oxidized

• None of the above

________________ is the gain of oxygen atoms.

________________ is the loss of oxygen atoms.

Is this an oxidation or reduction reaction?

water → hydrogen + oxygen

• Oxidation

• Reduction

Tags

NGSS.HS-PS1-7

Which element has been reduced?iron oxide + lithium → iron + lithium oxide

• iron

• lithium

• oxide

• iron oxide

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement is true:
Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons

• Mg_²⁺ loses 2 electrons

• Mg loses 1 electron

• Mg loses 2 electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

• magnesium

• magnesium and oxygen

• magnesium oxide

• oxygen

Tags

NGSS.MS-PS1-2