Final answer:
Double replacement reactions do not involve the transfer of electrons because they involve the exchange of ions between compounds.
Step-by-step explanation:
Double replacement reactions do not show transfer of electrons because they involve the exchange of ions between compounds, rather than the transfer of electrons. In a double replacement reaction, the anions and cations of the two compounds simply exchange. This type of reaction does not result in a change in oxidation numbers, which is a key indicator of electron transfer in redox reactions.