Miscibility refers to the ability of two substances to mix together to form a homogeneous solution.

* Water (H₂O):

* Oxygen (O₂): Miscible. Oxygen dissolves in water, though not very well. This is why fish can breathe underwater.

* Gasoline: Not miscible. Gasoline and water are immiscible; they don't mix and form separate layers.

* Sodium chloride (NaCl): Miscible (to a certain extent). Salt dissolves in water, forming a saltwater solution.

* Ethanol (C₂H₅OH): Miscible. Ethanol and water are completely miscible, forming a homogeneous solution.

* Gasoline:

* Oxygen (O₂): Miscible. Gasoline is flammable because it readily mixes with oxygen in the air.

* Sodium chloride (NaCl): Not miscible. Salt does not dissolve in gasoline.

* Ethanol (C₂H₅OH): Not miscible. Gasoline and ethanol are immiscible, though they can be blended to a degree.

* Sodium chloride (NaCl):

* Oxygen (O₂): Not miscible. Oxygen is a gas and salt is a solid.

* Ethanol (C₂H₅OH): Not miscible. Ethanol does not dissolve in salt.

* Ethanol (C₂H₅OH):

* Oxygen (O₂): Miscible. Ethanol is volatile and readily mixes with oxygen.

Summary:

* Miscible pairs:

* Water and Oxygen

* Water and Ethanol

* Gasoline and Oxygen

* Ethanol and Oxygen

* Immiscible pairs:

* Water and Gasoline

* Gasoline and Sodium Chloride

* Sodium Chloride and Oxygen

* Sodium Chloride and Ethanol