# IIT JEE Chemistry States of Matter

## States of Matter PDF Notes, Important Questions and Synopsis

**SYNOPSIS**

**Boyle’s law:**At constant temperature, pressure is inversely proportional to volume for a definite amount of ideal gas.**Charles’ law:**At constant pressure, volume is directly proportional to temperature for a definite amount of ideal gas.**Gay-Lussac’s law:**For a given mass and constant volume, pressure is directly proportional to temperature.**Avogadro’s law:**At the same pressure and temperature, equal volumes of ideal gases consist of equal number of moles or molecules.**Dalton’s law of partial pressure:**If two or more non-reacting gases are kept in a container, the total pressure exerted by the gases in the container is the sum of their partial pressures.**Graham’s law of effusion and diffusion:**The rate of effusion or diffusion of a gas is inversely proportional to the square root of molecular mass or density when compared at the same temperature and pressure.**Kinetic Theory of Gases:**

- A molecule is the smallest particle of the gas.
- Molecules do not settle under the influence of gravity.
- Molecules move in a straight line until or unless they collide with each other or with the wall of the container.
- The volume of gas molecules is very small, so it can be neglected in comparison to the volume of the container.
- Collisions of gas molecules with each other or collisions between gas molecules and the wall of the container are perfectly elastic.
- Kinetic energy of gas molecules is directly proportional to temperature.
- There are neither attractive nor repulsive forces present between gas molecules.

**Root mean square speed:**It is calculated by first taking squares of individual velocities, taking their mean and then the square root of the mean.**Average speed:**It is calculated by taking the arithmetic mean of the speeds of different molecules of the gas.-
**Most probable speed:**It is the speed possessed by maximum number of gas molecules at a given temperature. -
**Compressibility factor (Z):**It is the ratio of observed volume of a gas to the calculated volume under given conditions of temperature and pressure of the gas. -
**Critical temperature:**The temperature above which a gas cannot be liquefied no matter how much pressure is applied. -
**Critical pressure:**Pressure exerted by gas at critical temperature. -
**Critical volume:**Volume attained by gas at critical temperature and pressure. -
**Vapour pressure:**It is the pressure exerted by a vapour when vapour is in equilibrium with the liquid or solid form or both. -
**Boiling point:**The temperature at which the vapour pressure of a liquid becomes equal to the atmospheric pressure. -
**Freezing point:**The temperature at which the vapour pressure of a liquid becomes equal to the vapour pressure of the solid. -
**Surface tension:**It is the tendency of a fluid surface to occupy the smallest possible area. -
**Viscosity:**It is the property of liquids which determines their resistance to flow.

## IIT JEE Class Revise

- Sir plz solve it step by step ,U may leave part (b) but plz solve explaining part(a)
- Why joule thomson coefficient for ideal gas is zero?
- Which is correct graph for charle's law ,when the curve is plotted at .821 atm pressure for 10 mole idmolegas..sir plz do step by step
- Question: in a crystalline solid of XY3 cubic closed packed arrangement for its element Y,,,, X occupies.... ? Answer: 33% OCTAHEDRAL VOIDS. how was this worked out? not the math necessarily,, but the voids occupied by X being OCTAHEDRAL and not TETRAHEDRAL. i don’t understand this part. i’d really appreciate it if someone could walk me through the logic here. thanks.
- Q)There are 201 equidistant rows of spectators sitting in a hall A magician releases laughing gas n20 from the front and tear gas from the rear of the hall simultaneously. Which row spectators will have a tendency to smile and weep simultaneously. Molar mass of tear gas is 176.
- If silver atom occupy at centre, gold occupy body centre and lattice is CCP constituted by copper the formula of alloy will be
- Q) The density of a mixture of O2 and N2 at STP is 1.3g/lit. Calculate the the partial pressure of O2.
- Q) An open bulb containing air at 19 degree Celsius was cooled to a certain temperature at which the number of moles of gaseous molecules increased by 25% what is the final temperature?
- glass is supercooled liqiud or not

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