|Test Name||:||9th Class Chemistry Test 5|
|Total Time||:||30 Minutes|
States of matter in physics are the distinct forms that different phases of matter take on. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. Diffusion is defined as spontaneous mixing up of molecules by random motion and collisions to form a homogeneous mixture. Historically, the distinction is made based on qualitative differences in properties of Matter.