Gases & Solutions
States of Matter
A compound formed by elements X and Y crystallises in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face centres.The formula of the compound is
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Which one of the following relationships when graphed does not give a straight line for helium gas? I. K.E. and T at constant pressure and volume II. P v/s V at constant temperature for a constant mass III. V v/s 1/T at constant pressure for a constant mass
Which of the following plots does not represent Boyle's law?
Five grams each of the following gases at 87∘C and 750 mm pressure are taken. Which of them will have the least volume ?
van der Waal's equation for calculating the pressure of a non ideal gas is (P+V2an2)(V−nb)=nRT van der Waal's suggested that the pressure exerted by an ideal gas , Pideal, is related to the experiventally measured pressure, Pideal by the equation Pideal=observed pressure↑Preal+currection term↑V2an2 Constant 'a' is measure of intermolecular interaction between gaseous molecules that gives rise to nonideal behavior. It depends upon how frequently any two molecules approach each other closely. Another correction concerns the volume occupied by the gas molecules. In the ideal gas equation, V represents the volume of the container. However, each molecule does occupy a finite, although small, intrinsic volume, so the effective volume of the gas vecomes (V-nb), where n is the number of moles of the gas and b is a constant. The term nb represents the volume occupied by gas particles present in n moles of the gas . Having taken into account the corrections for pressure and volume, we can rewrite the ideal gas equation as follows : corrected pressure(P+V2an2)corrected volume(V−nb)=nRT For non-zero value of force of attraction between gas moleculer at large volume, gas equation will be :
Pressure of 1 g ideal gas X at 300 K is 2 atm. When 2 g of another gas Y is introduced in the same vessel at same temperature, the pressure become 3 atm. The correct relationship between molar mass of X and Y is :
If temperature and volume are same, the pressure of a gas obeying van der Waal's equation is :
Indicate the correct statement for equal volumes of N2(g) and CO2(g) at 25∘C and 1 atm.
The closed containers of the same capacity and at the same temperature are filled with 44 g of H2 in one and 44 g of CO2 in the other . If the pressure of carbon dioxide in the second container is 1 atm , then pressure of hydrogen in the first container would be :