Question

Help me please!!





It is not possible to separate _____ by physical means.

a)Mixtures
b)Salt Water
c)Solutions
d)Compounds

Answer 1

.....Thanks alot everyone! -_- you've been a great help!.. for all you flvs people... its D..

Answer 2

Just saw the question now, but yes, the answer is D.

Salt water is an example of a solution, and a solution is a type of mixture, so by multiple choice logic none can be the right answer! Seriously though - mixture are combinations of two compounds that are physically combined but do not undergo a chemical reaction with one another to produce a new compound. For instance, when you dissolve salt in water, you don't produce any new products, and you can boil away the water to leave only the salt (a physical method of separation). You cannot separate a compound by physical means because by definition this would be a chemical reaction as you're breaking bonds.