MYP Chemistry Topic Redox Reactions Questionbank

Why is a substance that undergoes reduction specifically referred to as an 'oxidising agent'?

In a zinc–manganese dioxide dry cell battery, the redox processes at the electrodes can be represented by the following half-equations:

\text{Anode: } \text{Zn(s)} \rightarrow \text{Zn}^{2+}(\text{aq}) + 2e^{-}

\text{Cathode: } \text{MnO}_2(\text{s}) + \text{H}^{+}(\text{aq}) + e^{-} \rightarrow \text{MnO}(\text{OH})(\text{s})

Based on the principle that the total number of electrons lost must equal the total number of electrons gained in a redox reaction, what is the molar ratio of $\text{Zn}$ to $\text{MnO}_2$ consumed in the overall cell reaction?

Which of the following statements correctly describes the redox nature of cellular respiration?

True or False: In any redox reaction, oxidation can occur independently without a corresponding reduction process taking place.

If an element in a chemical reaction undergoes a change where its oxidation state moves from $+2$ to $+4$ , which statement correctly describes the electron transfer involved?

MYP Chemistry Redox Reactions Questionbank

MYP Chemistry Redox Reactions Questionbank

MYP Chemistry Redox Reactions Questionbank

MYP Chemistry Redox Reactions Questionbank

MYP MYP Chemistry Topic Redox Reactions Questionbank