A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is:

Out of the following, an example of matter which can be termed as fluid is:

The best evidence for the existence and movement of particles in liquids was provided by:

Which of the following statement is incorrect?

When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment: