The strength of an aqueous NaOH solution is most accurately determined by titrating :
(Note : consider that an appropriate indicator is used)

A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63^oC while the other boils at 60^oC What is the best way to separate the two liquids and which one will be distilled out first ?

The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :

The magnitude of work done by a gas that undergoes a reversible expansion along the path ABC shown in the figure is _______.