Equal volumes of different gases under similar conditions of temperature and pressure contain equal number of _______

Density of ozone relative to oxygen is under the same temperature & pressure :

Under similar conditions of temperature and pressure, In which of the following gases the velocity of sound will be largest :-

The volume of 1 mol of a gas at standard temperature and pressure is .

Two substances A and B of equal mass m are heated by uniform rate of 6 "cal"s^(-1) under similar conditions. A graph between temperature and time is shown in figure. Ratio of heat absorbed H_(A) //H_(B) by them during complete fusion :-

Water potential of pure water at standard temperature is equal to

The density of water is 1000 kg m^(-3) . The density of water vapour at 100^(@)C and 1 atm pressure is 0.6 kg m^(-3) . The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. Estimate the ratio (or fraction) of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure.