States of Matter

The compressibility factor of a Vanderwaal gas is 0.5 at $27°C$  and 24 atm. The value of Vanderwaal constant 'a' (in atm-L²/mol²) is (b = 0.10 L/mol, R = 0.08 L-atm/K-mol)

Maximum number of different photons emitted when only two H atoms are placed in a container and each is present in 3rd excited state:

How much propyl alcohol must be added to 1.00lt. of water so the solution will not freeze at –15°C ? (K_f of water = 1.86 KKgmol^-1)[d(H₂O) = 1 g/ml and molecular mass of propyl alcohol = 60 g/mol ]

Select the INCORRECT statement:

Two glass bulbs A and B are connected by a very small tube having a stop-cock. Bulb A has a volume of 100 cm³ and contained the gas; while bulb B was empty. On opening the stop-cock, the pressure fell down to 40%. The volume (in mL) of the bulb B must be :

At critical condition of temperature and pressure for a real gas, what would be the value of 16 Z? Here, Z is its compressibility factor.

The values of van der Waal's constants 'a' and 'b' for three different gases are given below

The correct order of liquefaction of gases is

Which amongst the following options is correct graphical representation of Boyle's Law?

Intermolecular forces are forces of attraction and repulsion between interacting particles that will include:
A. dipole-dipole forces.
B. dipole - induced dipole forces.
C. hydrogen bonding.
D. covalent bonding.
E. dispersion forces.

Choose the most appropriate answer from the options given below:

The correct option for the value of vapour pressure of a solution at 45°C with benzene to octane in molar ratio 3:2 is:
[At 45°C vapour pressure of benzene is 280 mmHg and that of octane is 420 mmHg. Assume Ideal gas]