(N/A) $1$. Take two iron nails and fix them on a rubber cork. Place the cork in a $100\,mL$ beaker.
$2$. Connect the nails to the two terminals of a $6\,V$ battery through a bulb and a switch.
$3$. Pour some dilute $HCl$ into the beaker and switch on the current. The bulb will glow,indicating that $HCl$ conducts electricity due to the presence of $H^+$ ions.
$4$. Repeat the same experiment using glucose solution and alcohol solution separately.
$5$. Observation: The bulb does not glow in the case of glucose and alcohol solutions.
$6$. Conclusion: Glucose and alcohol do not dissociate into ions in aqueous solution. Since they do not produce $H^+$ ions,they do not show acidic properties,even though they contain hydrogen.