Name or state the following :

1. The law which states that pressure remaining constant the volume of a given mass of dry gas is directly proportional to it's absolute [Kelvin] temperature.
2. The law which studies the relationship between pressure of a gas and the volume occupied by it at constant temperature.
3. An equation used in chemical calculations which gives a simultaneous effect of changes of temperature and pressure on the volume of a given mass of dry gas.
4. The standard pressure of a gas in cm. of mercury corresponding to one atmospheric pressure.
5. The absolute temperature value corresponding to 35°C.

Give reasons for the following :

Gases unlike solids and liquids exert pressure in all directions.

Give reasons for the following :

Temperature remaining constant the product of the volume & the pressure, of a given mass of dry gas is a constant.

Give reasons for the following :

All temperatures on the Kelvin scale are in positive figures.