Question

Which of the following factors determine whether two liquids are miscible or not?

• A. Molecular size
• B. Molecular polarity
• C. Density
• D. Both B and C

Answer 1

The correct option is B Molecular polarity

"Like dissolves like". It refers to "polar" and "non-polar" solvents and solutes.

E.g: Water is polar. Oil is non-polar. Water will not dissolve oil. Water is polar.

Salt (NaCl) is ionic. Like dissolves like that means polar dissolves polar, so water dissolves salt.

Polar substances will dissolve in Polar substances. Non-polar substances will dissolve in non-polar substances.

Non-polar substances will not dissolve in polar substances.

Hence option B is correct.