19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
If some moles of O2 diffuse in 18 sec and same moles of other gas diffuse in 45 sec then what is the molecular weight of the unknown gas? (a) 18 x (b) 45 x (c) x (d) x
Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mole litre–1 ? (R = 0.082 litre atm mol–1 deg–1)
2 g of hydrogen diffuse from a container in 10 min. How many gram of oxygen would diffuse through the same container in the same time under similar conditions? (Manipal 2010)
n n C H What is the value of n? (WB JEE 2010)
The density of a gas at 27oC and 1 atm is d. Pressure remaining constant at which of the following temperatures will its density become 0.75 d?
If P, V, M, T and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by
For an ideal gas ratio of P d is equal to:
At identical temperature and pressure, the rate of diffusion of hydrogen gas is 3 3 times that of a hydrocarbon having molecular formula
The weight of CH4 in a 9-L cylinder at 27oC temperature and 16 atm pressure is (R = 0.0821 L atm K–1 mol–1)
Pure hydrogen sulphide is stored in a tank of 100 litre capacity at 20ºC and 2 atm pressure. The mass of the gas will be
If 40 L of a gas is stored under a pressure of 150 atm at 300 K. How many moles of the gas are present in the cylinder?
The gases become denser at …A… Here, A refers to
Gas equation PV = nRT is obeyed by ideal gas in
If 10–4 dm3 of water is introduced into a 1.0 dm3 flask at 300 K. How many moles of water are in the vapour phase when equilibrium is established ? (Given, vapour pressure of H2O at 300 K is 3170 pa R = 8.314 JK–1 mol…
An ideal gas equation is arranged as X P M RT M = molecular mass Where, X represents
Which of the following expression is true for an ideal gas ? (a) P V T P V T (b) V V T T P P (c) P T V P T V (d) P VT P V T
An ideal gas equation is also called the …I… Here, I refers to
Which one of the following is not the value of gas constant (R)? (a) 0.0821 L atm k mol (b) 1.99 cal K mol (c) 8.3 JK mol (d) 10.2 JK mol
The value of universal gas constant (R) depends on
In the gas equation PV = nRT, the value of n depends upon
In the gas equation PV = nRT, the value of R depends upon
A gaseous mixture contains 2 moles of A and 3 moles of B. Total pressure of the mixture is 5 atm. The partial pressures of A and B are respectively. (AFMC 2010)
The compressibility factor (Z) is defined as (a) real ideal V V (b) P Z nRT (c) ideal real V V (d) nRT Z PV
In Van der Waal’s equation of state for a non-ideal gas, the term that accounts for intermolecular forces is
The value of Van der Waal’s constant ‘a’ for the gases O2, N2, NH3 and CH4 are 1.360, 1.390, 4.170 and 2.253L2 atm mol–2 respectively. The gas which can most easily be liquified is