Why is water not used as a solvent in paper chromatography​

Because the kind of compounds that you try to determine using paper chromatography (organic compounds) are usually not soluble in water. Furthermore, water could react chemically with some of this compounds, because it's a very reactive molecule. You need organic solvents that are mostly inert.

You need organic solvents that are mostly inert.

Water could react chemically with some of these compounds because it's a very reactive molecule.

And some compounds are not soluble in water.

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.