Redox Reaction

Oxygen always has an oxidation number of...

• -1
• 1
• 2
• -2

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Is calcium oxidized or reduced in the following reaction? 
2CaO--> 2Ca + O₂

• Oxidized
• Reduced

Tags

NGSS.HS-PS1-2

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

• Reduced
• Synthesized
• Oxidized
• None of the above

Tags

NGSS.HS-PS1-2

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

• Zinc
• Hydrogen
• Oxygen
• None

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-PS1-2

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

• Oxidized
• Reduced
• Neutralized
• Precipitated

Tags

NGSS.HS-PS1-2

A redox reaction is NOT:

• all reactions

• a combustion reaction

• a reduction-oxidation reaction

• a reaction in which electrons are transferred from one atom to another

Tags

NGSS.HS-PS1-2

Combustion and single-replacement reactions are __________ redox reactions.

• always

• never

• sometimes

• mostly

Tags

NGSS.HS-PS1-2

Defined as the loss of electrons.

• oxidation

• reduction

• redox

• OIL RIG

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

These keep track of the movement of electrons.

• (+) and (-) signs

• oxidation numbers

• coefficients

• subscripts

Tags

NGSS.HS-PS2-5