Any liquid that contains alcohol. Alcohol is a diuretic. Soda and coffee also dehydrate you. This is because they are high in sugar.
Diarrhea dehydrates the body - in extreme cases to the point of death - so liquid is very important in managing this.
water?
It dehydrates your body.
hydrolysis
You may be referring to when one liquid is dissolved into another. Alcohol has a great power to dissolve water for example. This is how alcohol sterilizes a surface - it dehydrates any small bacteria etc. This same process is sometimes used to rapidly dry photographic negatives, when time is important. Perhaps for a news photographer.
all alcohol dehydrates your body
Any type of saline or sodium (salt) based liquid will dissolve certain cells extremely quick such as fat cells in the body or most plant cells containing chlorophyl. To dissolve smaller cells such as amoeba or blood cells, acidic liquids work the quickest, such as chlorine.
My understanding is that white wine, a clear liquid, is OK. But alcohol dehydrates as does Picolax - hence the keep drinking clear liquids rule. So don't drink much and keeo taking water.
all the salt dehydrates you
Yes, because salt absorb easily water.
Yes, it dehydrates the body and weakens the bodies defenses.
when swallowed,dehydrates you, making you thirstier.