FORM 5 CHEMISTRY REDOX EQUILIBRIUM

Another name for a "oxidation-reduction" reaction is

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

Which of the following is oxidation process?

• carbon dioxide loses oxygen

• a sodium atom loses an electron

• a bromine atom gain an electron

• a chlorine molecules gains hydrogen

What element is being Oxidized?

• N
• H
• O
• S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What element is being Reduced?

• N
• H
• O
• S

Tags

NGSS.HS-PS1-2

What is oxidation number of H in H₂O?

• 0
• -2
• -1
• +1

Tags

NGSS.HS-PS1-1

What is oxidation number of Cr in Cr₂O_7^2-?

• -2
• +2
• +6
• +12

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of N in NO_2^-1?

• -3
• +4
• -2
• +3

Tags

NGSS.HS-PS1-1

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

• Oxidized
• Reduced
• Neutralized
• Precipitated

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