Chemistry - Redox Reaction

Identify if the following reactions are redox reactions or non-redox reaction:

N₂ + O₂ → 2NO

(a)  

Identify if the following reactions are redox reactions or non-redox reaction:

Zn + CuO → ZnO + Cu

(a)  

Identify if the following reactions are redox reactions or non-redox reaction:

Na₂SO₄ + BaCl₂ → 2NaCl + BaSO₄

(a)  

Which one(s) are the oxidising agents?

• acidified potassium manganate (V||)

• Acidified potassium dichromate (VI)

• aqueous potassium iodide

• hydrogen

What do you understand the term 'reduction'? Choose the correct answer below

• oxidation state is increased

• gain of hydrogen

• gain of electron

• loss of hydrogen

• gain of oxygen

In which equation does the oxidation of the underlined compound occur?

• 2CuO + C → CO₂ + Cu

• Fe₂O₃ + 3CO → 2Fe + 3CO₂

• 2Mg + O₂ → 2MgO

• MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂

Tags

NGSS.HS-PS1-2

Hydrogen acts as a reducing agent, by

• taking oxygen only

• giving electrons only

• taking hydrogen

• taking oxygen and giving electrons

Tags

NGSS.HS-PS1-2

While Iodide ion (I^-) oxidised to Iodine (I₂), a change in colour from colourless to

• brown occurs

• pink occurs

• blue occurs

• violet occurs

Oxidation is also referred to as

• combustion only

• respiration only

• transpiration

• combustion and respiration

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Upon oxidation of acidified potassium manganate (VII), the purple colour of Manganese

• stays

• change to pink

• becomes blue

• becomes colourless