Gen chem, miscibility question from topscore

[dl9006]

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Could someone explain this?

Question:
Which of the following characteristics determine miscibility between two liquids?

a) density
b)electroneg
c) polarity
d) molecular size
e) a and c

Ans: C


I was thinking if the density of the two liquids are significantly different then the liquids wouldn't be able to mix since one liquid will float on top of the other.

shouldn't the answer then be E?

 

[krazchikin]

seems that way, but the two compounds will slowly separate over time, like those in a homogenous mixture such as salad dressing.....just remember that only polarity dictates miscibility and you'll be fine

 

[UCB05]

Could someone explain this?

Question:
Which of the following characteristics determine miscibility between two liquids?

a) density
b)electroneg
c) polarity
d) molecular size
e) a and c

Ans: C


I was thinking if the density of the two liquids are significantly different then the liquids wouldn't be able to mix since one liquid will float on top of the other.

shouldn't the answer then be E?

Density is dependent on interactions with self molecules. Miscibility depends on interactions between two different ones. They're mutually exclusive.