Question

Which one of the following is insoluble in water?
(a) alcohol
(b) vinegar
(c) coconut oil
(d) sugar

Answer 1

(c) coconut oil
alcohols form hydrogen bonds with water, they tend to be relatively soluble in water.

Vinegar is a polar substance, and its molecules are attracted to water molecules (called ‘hydrophilic’).

Therefore, it can be mixed with water. it forms a homogeneous solution with water.

Due to hydrogen bond formation with water, The polar water molecules have the capability to attract the negative and positive areas on the polar sucrose molecules which make sucrose dissolve in water.
Coconut oil is insoluble in water.