A binary liquid mixture of components A and B exhibits an azeotrope at a specific composition. Which of the following statements is ALWAYS true about this azeotropic mixture?

The number of moles of $KMn{O_4}$ that will be needed to react completely with one mole of oxalate ion in acidic solution is

A mixture of two volatile liquids A and B shows a negative deviation from Raoult's law. Which of the following statements is INCORRECT regarding this mixture?

If 1 kg of solvent contains 2 moles of solute, what is the molality of the solution?

Which of the following methods is NOT suitable for concentrating a protein solution?

1 gram of sodium hydroxide was reacted with $25 \mathrm{mL}$ of $0.75 \mathrm{M}$ sulfuric acid ($\mathrm{H_2SO_4}$). What mass of sodium hydroxide remains unreacted?

Chromite ore is concentrated by:

The least count of burette used normally in laboratory is :

For the reaction : ${{\rm{N}}_2} + 3{{\rm{H}}_2} o 2{\rm{N}}{{\rm{H}}_3}$ ; if ${E_1}\,and\,{E_2}$ are equivalent masses of $N{H_3}$ and ${N_2}$ respectively, then ${E_1}\, - \,{E_2}$ is :

100g of a liquid A (molar mass 140 g/mol) and 100g of liquid B (molar mass 70 g/mol) form an ideal solution. What is the mole fraction of B in the vapor phase? (Assume $P^0_A = 70$ mmHg and $P^0_B = 140$ mmHg)

When one mole of ${\rm{KMn}}{{\rm{O}}_4}$ reacts with $HCl$, the volume of chlorine liberated at $NTP$ will be: