On which factor does quantity of heat depend and what effect on the molecules of matter when the temperature is varied ?

I don’t know the answer for the first one

but for the second one ‘what effect on the molecules of matter when the temperature is varied?’

When the temperature is varied — the kinetic particle theory states that matter is made up of particles that are constantly moving or in a continual state of motion.

When temperature is increased, the molecules gain more energy (via heat) so they move faster and have more frequent collisions with one another.

When temperature is decreased, the molecules lose kinetic energy, so they move slower and have less frequent collisions.