Which of the following is not matter?
cold
The explanation for the correct answer:
Anything that occupies space and has mass is called matter.
b) Cold: it is a property that indicates the temperature of a substance.
The explanation for incorrect answers:
a) Cold drink: Cold drink takes the shape of a bottle in which it is filled. So, it has space. It has mass also. It is in a liquid state of matter.
c) Hot coffee: Hot coffee takes the shape of the cup in which it is filled. So, it has space. It has mass also. It is in a liquid state of matter.
d) Air: Air is a gaseous state of matter. It can be filled in a cylinder, in a balloon, etc. Thus it has space. It has its mass too.
Hence, option b) is correct. Cold is not a matter.