REDOX & Driving Forces

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Which of the following represents oxidation?

• Zn → ZnO
  

• Fe³⁺ → Fe²⁺

• Cl₂ → 2Cl^-

In the reaction Zn + 2HCl --> ZnCl₂ + H₂

which element, if any, loses electrons and becomes a cation?

• Zinc

• Hydrogen

• Chlorine

• None

In the reaction

2Ca(s) + O₂(g) --> 2CaO(s), calcium ______________.

• Gains electrons and becomes an ANION

• Does not gain or lose electrons

• Loses electrons and becomes a CATION.

• None of the above

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

What substance loses electrons in the following reaction?

4Fe + 3O₂ --> 2Fe₂O₃

• Iron

• Fluorine

• Oxygen

In the reaction below, what happens to copper?
CuCl2 (aq) + Zn (s) -> ZnCl2 (aq) + Cu (s)

• Copper gains electrons

• Copper loses electrons

• Remains Constant

In the reaction below, what happens to oxygen?
 $CH_{4_{ }}\left(g\right)\ +\ 2O_{2_{ }}\left(g\right)\ \rightarrow\ CO_{2\ }\left(g\right)\ +2\ H_2O\ \left(g\right)$  

• oxygen gains electrons and becomes ANIONS

• Oxygen loses electrons and becomes CATIONS

• Remains Constant

In the reaction below, what happens to oxygen?
 $2H_2O_2\left(l\right)\ \ \rightarrow\ +2\ H_2O\ \left(l\right)\ +\ O_2\left(g\right)_{ }$  

• oxygen gains electrons and becomes an ANION

• Oxygen loses electrons and becomes  a neutral molecule

• Remains Constant