You were tasked to check if the liquid sample you have is a substance or a mixture. Which among these tests is the BEST way to do so?l. color comparizon
lltaste comparizon
III. Boiling Test
IV. Melting Test
a. I, II, III and IV. b. l,II, and III only
c. I and Ill only
d. I, II, and IV only

The correct answer is - option C.  I and Ill only.

Explanation:

One never tastes a unknown chemical in chemistry lab especialy a liquid that can be hazardous. Melting test is for solid as a solution is already a liquid state so melting test can not be perform on it.

The two test can be perform on given sample that are color comparison and boiling test to check if it is substance or a mixture. A misture is prepared from mixing different kind of compounds that can give different kind of color  while a particular substance give a uniform color always or remain colorless.

Boiling test can be helpful in distinguish a mixture from a substance as a particular sybstance always give a particular boiling point but mixture can be varry and depend of the coponents mixed together

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.