Separating funnel technique is used to separate the components which are
Immiscible liquids
The explanation for the correct option:
Separation techniques are applied depending upon the property of substances which is to be separated.
(B) Immiscible liquids: Liquids which form separate layers when mixed with each other and can be separated easily using a separating funnel. The mixture of immiscible liquids when taken in a separating funnel, they form different layers depending upon the density. The stopper can be open and we can separate the lower layer and the upper layer will be remaining in that separating funnel.
The explanation for incorrect option:
(A) Miscible liquids: Liquids which are miscible with each other, that do not form layers. This type of mixture of miscible liquids can be separated using simple distillation whose boiling point difference is greater than
(C) Partially miscible liquids: Liquids which are not completely miscible with each other is called partially miscible liquids. This type of mixture of partially miscible liquids can't be separated by separating funnel since they are not forming separate layers
D) Solid and liquid: Mixture which contains solid and liquid can be separated depending upon the properties. We can use the filtration technique to separate solid from liquid since the liquid will pass through the filter paper but solid not
Thus, option (B) i.e., Immiscible liquids can be separated using a separating funnel.