Redox Quiz 1

In terms of O, oxidation is the

• gain of oxygen atoms

• loss of oxygen atoms

In terms of H, oxidation is the

• gain of hydrogen atoms

• loss of hydrogen atoms

In terms of electrons, oxidation is the

• gain of electrons

• loss of electrons

In terms of oxidation state, reduction is the

• increase in oxidation state

• decrease in oxidation state

The oxidising agent of a redox reaction is the

• reactant that is oxidised

• reactant that is reduced

• product of an oxidation process

• product of a reduction process

For the reaction Fe₂O₃ + CO --> Fe + CO_2,

• Fe₂O₃ is oxidised

• CO is oxidised

• Fe is oxidised

• CO₂ is oxidised

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

For the reaction CH₄ + O₂ --> CO₂ + H₂O,

• CH₄ is oxidised

• CH₄ is reduced

• CO₂ is oxidised

• CO₂ is reduced

For the reaction Mg + CuCl₂ --> MgCl₂ + Cu, which statement explains the role of Mg correctly?

• Mg is the oxidising agent because itself is oxidised

• Mg is the reducing agent because itself is reduced

• Mg is the oxidising agent because it causes oxidation of CuCl₂

• Mg is the reducing agent because it causes reduction of CuCl₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

For the reaction, 2NaBr + Cl₂ --> 2NaCl + Br₂

• NaBr is the oxidising agent

• Cl₂ is the oxidising agent

• NaCl is the oxidising agent

• Br₂ is the oxidising agent

Which reactions are examples of redox reactions?

• browning of apples when left in the air

• rusting of steel machinery

• burning a piece of paper

• adding vinegar to baking soda