Calculate vapour pressure of volatile liquid A at given temperature if mole fraction and vapour pressure of volatile liquid B are 0.4 and 900 mm Hg respectively [ $\mathrm{P}_{\text {total }}=600 \mathrm{~mm} \mathrm{Hg}$ ]

Identify from following the correct set of thermodynamic conditions for a reaction to be nonspontaneous at all temperatures.

"It is impossible to determine simultaneously the exact position and exact momentum of an electron." This statement is called

Which of the following statements is false about oxygen and sulphur?