Oxidation and Reduction (N5 Revision)

Oxidation is....

• Gain of electrons

• Loss of electrons

• Both the loss and gain of electrons

• None of these

Reduction is....

• Gain of electrons

• Loss of electrons

• Both the loss and gain of electrons

• None of these

Tags

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-PS1-2

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-
• Pb⁴⁺ + 2e^- →Pb²⁺
• 2O^-2 →O₂ + 4e^-
• Fe + 3e^- →Fe³⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

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

• Oxidized
• Reduced
• Neutralized
• Precipitated

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

Another name for a "oxidation-reduction" reaction is

• chemical reaction
• neutralization reaction
• redox reaction
• nuclear reaction

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

• Reduced
• Synthesized
• Oxidized
• None of the above

Tags

NGSS.HS-PS1-2

The following is the half equation of a reaction

What is meant by reduction reaction based on the equation?

• Electrons are received by chlorine

• Electrons are donated by chlorine

• Electrons are received by chloride ions

• Electrons are donated by chloride ions

Tags

NGSS.HS-PS1-2