During evaporation, molecules with high kinetics energies keep on leaving the liquid phase. This results in a decrease in kinetic energy of the remaining molecules. Therefore, the temperature falls as a average kinetic energy of molecules is directly proportional to temperature. Hence, palm becomes cool when alcohol evaporates.

Acetone has more stronger intermolecular attractive force than ether.

Answer:

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.

Meniscus is a curved surface of a liquid seen in a glass tube (capillary tube), when a glass tube is dipped into a liquid. It is because of the inward pull of surface tension acting on the surface of the liquid.

The meniscus in a mercury formed is concave downward as the cohesive force of mercury is stronger than adhesive force when it is taken in a glass tube. Therefore, mercury has convex meniscus in a glass tube i.e. concave downward.

a) Efflorescence: The phenomenon in which certain hydrated substances lose their water of crystallization partly or completely when exposed to ordinary atmospheric conditions for sometimes is called as efflorescence.

b) Deliquescence: The phenomenon in which hygroscopic substances absorb moisture from the air to such an extent that they are finally converted into solution form is called deliquescence.

c) Hygroscopic: Those substances which absorb moisture when exposed to ordinary atmospheric...

Lattice points in a face centered cubic is at the centre of each face of the cube, in addition to the lattice points at the corners wherease lattice point is at the centre of the body in body centered cubic, in addition to the lattice points at the corners of the cube.

The positions of atoms, molecules or ions in a crystal, relative to one another in space, are designated usually by points. Such a representation is called crystal lattice (space lattice)

A unit cell of crystals is the smallest repeating unit in a crystal lattice which when repeated again and again in different directions results in the crystal of the given substance.

A plot of variation of solubility of a solute with temperature is known as a solubility curve.

Information given by solubility curves:

i. Solubility of a substance at a desired temperature.

ii. Idea about variation of solubility with temperature.

iii. Comparison of the solubility of different substances at different temperatures.

iv. Prediction of which substance will crystallize out first when a solution of two or more solutes is evaporated or cooled.

Application of Graham's Law of Diffusion/Effusion are mentioned below:

1. Graham's law helps to separate the gases having different densities.

2. It helps to determine the molar mass and density of an unknown gas by comparing their rates of diffusion with the known gas.

3. It helps in separating the isotopes of the same element.

Boyle's Law:Boyle's law states that the volume of a given mass of a gas at constant temperature of a gas at constant temperature is inversely proportional to the pressure of the gas.
If V be the volume and P be the pressure of the given mass of a gas at constant temperature T. Then,
From Boyle's law :

V x P = constant

Charles's Law: Charles's law state that the volume of a given mass of a gas at constant pressure is directly proportional to the absolute temperature of...