If milk is mixed with gasoline which substance will float

Answer is Gasoline.

Explanation: For determining which substance will float, it can be determined with the values of density.

Density of Milk =

Density of Gasoline =

The one with lower density will float and the one with more will sink.

So here, we can see that the density of gasoline is less therefore, this will float.

c (diamond),

sio2 (quartz)