Which of the following is a mixture?
a) water
b) carbon-dioxide
c) methane
d) coffee with milk
e) air
f) salt
g) brass
h) sugar
i) mayonnaise
j) none of the above
k) all of the above

Answer. Posted on Sunday, January 25, 2015.

Mixture is a system made up of two or more substances that are not chemically united.
Thereby, coffee with milk, air, brass and mayonnaise are mixtures.