Question

how can we test whether the liquids conduct electricity​

Answer 1

Some liquids such as oil or alcohol do not form ions and do not conduct electricity. Vinegar is mostly water with a small amount of acetic acid in it. The acetic acid separates into ions on so that the solution conducts electricity.

Answer 2

by passing copper wire that is connected with bulb.
if bulb glow then we can say that liquid conduct electricity
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