Why is water unable to dissolve substances like oil?Choose 1 answer:Choose 1 answer:(Choice A) Water is polar and oil is nonpolar.AWater is polar and oil is nonpolar.(Choice B) Water is nonpolar and oil is polar.BWater is nonpolar and oil is polar.(Choice C) Both water and oil are nonpolar.CBoth water and oil are nonpolar.(Choice D) Both water and oil are polar.DBoth water and oil are polar.
Question
Why is water unable to dissolve substances like oil?Choose 1 answer:Choose 1 answer:(Choice A) Water is polar and oil is nonpolar.AWater is polar and oil is nonpolar.(Choice B) Water is nonpolar and oil is polar.BWater is nonpolar and oil is polar.(Choice C) Both water and oil are nonpolar.CBoth water and oil are nonpolar.(Choice D) Both water and oil are polar.DBoth water and oil are polar.
Solution
The correct answer is (Choice A) Water is polar and oil is nonpolar.
This is because water molecules are polar, meaning they have a positive charge on one side and a negative charge on the other. Oil molecules, on the other hand, are nonpolar, meaning they do not have a charge.
Polar substances tend to dissolve in other polar substances, and nonpolar substances tend to dissolve in other nonpolar substances. This is often summarized by the phrase "like dissolves like."
Since water and oil have different polarities, they do not mix or dissolve in each other. This is why oil floats on top of water.
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