State the main postulates for Kinetic theory of gases.

Following are the major/main postulates of kinetic theory of gases:

• Molecules: A gas is composed of tiny particles called molecules whose volume, as compared with that of gas, is negligible.
• Random Motion: The molecules of a gas are in a state of constant random motion.
• Elastic Collision: Collision between gas-molecules or gas molecules and container is perfectly elastic. There is no loss of energy.
• Pressure exerted by Gas: Pressure exerted by gas is due to the bombardment of the walls of...

Explain the types of physical division and chemical division of matter.( Also explain the sub-types of chemical division.)

Matter is anything that possesses mass, occupies space and may be perceived through one or more senses.

                           The physical divisions of matter are:

1. Solid : Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around.

2. Liquid : Liquid matter is made of more loosely packed particles. It will take the shape of its container. Particles can...

Point out differences between evaporation and boiling.

Answer:

What is meant by aqueous tension? How does temperature affect aqueous tension?

Why is the law of conservation of mass is known as law of indestructibility of matter?

The law of conservation of mass is known as indestructibility of matter because there is no loss of mass when reactant reacts to form product i.e. total mass of the reactant is equal to total mass of the product.

Why do the gases do not settle on the bottom of the container?

Since gaseous molecules have a very little force of attraction, are in a rapid motion in all possible directions continuously and gravity has no effect no gaseous state, the gases do not settle on the bottom of the container.

The stress-strain graphs for materials A and B are shown in Figure The graphs are drawn to the same scale. (a) Which of the materials has the greater Young’s modulus?(b) Which of the material is mo...

(a)
Young’s modulus is given by the equation,Y= stress/ strainAt a particular strain, Young’s modulus is directly proportional to the stress.
The slope of stress strain curve for material A has greater than the material B which gives higher value of Young's modulus.

(b)Material B is more brittle since the fracture point (end of solid curve) is at lower corresponding value of stress.

(c) Material A is more ductile since it has a greater plastic region; from elastic limit to breaking point.

(d)The...