Which of the following solutes would NOT form a solution if added to water?
A - NH3 (ammonia)
B - NaCl (sodium chloride)
C - KCl (potassium chloride)
D - HCl (hydrogen chloride)
E - CH4 (methane)
Answer: E - CH4 (methane)
Methane is non-polar and water is polar, meaning methane cannot dissolve water. HYDROPHOBIC are non-polar molecules that cannot interact with water molecules.