List of top Chemistry Questions on Expressing Concentration of Solutions asked in KEAM

A solution is prepared by adding 4 g of a substance to 46 g of ethanol. What is the mass percentage of the solute?
N\(_2\) exerts partial pressure of 7.698 bar in 1L water at 298K. What is the mole fraction of N\(_2\) in the solution? Given that N\(_2\) = 76.48K bar.

Identify the product of the reaction:

Which among the following acts as a Lewis acid?
Aspirin is also called:
The correct order of boiling point:
CH\(_3\)-CH\(_2\)-CH\(_2\)-CH\(_2\)-NH\(_2\), CH\(_3\)-CH\(_2\)-NH-CH\(_2\)-CH\(_3\), CH\(_3\)-CH\(_2\)-N(CH\(_3\))\(_2\)
10 g of alcohol is dissolved in 90 g of water. The percentage of alcohol in the solution is
A solution contains 4 g of NaOH and 16.2 g of water. The mole fraction solute and solvent are respectively
The amount of solute (molar mass $ 60\text{ }g\text{ }mo{{l}^{-1}} $ ) that must be added to $180\, g$ of water so that the vapour pressure of water is lowered by $10\%$, is
The difference between the boiling point and freezing point of an aqueous solution containing sucrose (molecular mass = $342 g$ $mol^{-1}$) in $100\,g$ of water is $105 .0^\circ C$. If $K_f \,and\, K_b$ of water are $1.86$ and $0.51 \,K \,kg mol^{-1}$ respectively, the weight of sucrose in the solution is about