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Question

In a certain experiment, three liquids were mixed. Five milliliters of methanol (CH3OH), five milliliters of hexane (C6H14), and 5 milliliters of water (H2O) were added to a cylindrical tube. The tube was then sealed and shaken to mix the contents completely. After the liquid had settled, the test tube appeared as shown in the diagram. Methane and water formed a homogeneous mixture on the bottom of the test tube. The hexane formed a separate layer on top of this solution.
Which of the following statements can be used to justify these observations?
529498_7d0d411fab464440b6fdf61be92a2369.png

A
Methanol and water do not form favorable attractive forces with each other.
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B
Hexane does not form favorable attractive forces with either water or methanol.
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C
Methanol, water, and hexane all form favorable attractive forces with each other.
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D
Hexane is less dense than either methanol or water, so floats on top.
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Solution

The correct option is D Hexane is less dense than either methanol or water, so floats on top.
Hexane is non-polar and not miscible with water, so we will have a two phase system when we mix these components and other reason is hexane is less dense than water.Density of water 1 g/mL. Density of hexane 0.6548 g/mL.


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