List of top Chemistry Questions

A solution is obtained by mixing $200\, g$ of $30\%$ and $300\, g$ of $20\%$ solution by weight. What is the percentage of solute in the final solution?
According to Boyle-Vant Hoff law for solutions, the osmotic pressure of a dilute solution is
An aqueous solution of $2\%$ non-volatile solute exerts a pressure of $1.004$ bar at the normal boiling point of the solvent. What is the molecular mass of the solute?
An aqueous solution of an electrolyte AB has b.pt.of 101.08$^\circ$C. The solute is 100% ionised at b.pt.of water. The f.pt. of the same solution is $-1 -80 ^\circ C. AB (K_bI/K_f = 0.3)$
An aqueous solution of glucose was prepared by dissolving 18 g of glucose in 90 g of water. The relative lowering in vapour pressure is
An aqueous solution of methanol in water has vapour pressure
An aqueous solution of non-electrolyte 'A' with molecular mass $60$ contains $6\,g$ in $500\, mL$ and has a density equal to $1.05 \,g \,mL^{-1}$. The molalityof solution is
An ideal solution was obtained by mixing methanoland ethanol. If the partial vapour pressure of methanol and ethanol are 2.619 k Pa and 4.556 k the composition of vapour(in terms of mole fraction) will be
Aquatic species are more comfortable in warm waters than cold waters. $K_H$ values for both $N_2$ and $O_2$ decrease with increase of temperature.
At equilibrium, vapour phase will be always rich in component which is more volatile. The composition of vapour phase in equilibrium with the solution is determined by the partial pressures of the components.
The vapour pressure of an aqueous solution of sucrose is less than $1.013$ bar at $373.15\, K$. Vapour pressure of water is $1.013$ bar at $373.15\, K$.
At a given temperature, osmotic pressure of a concentrated solution of a substance___________ .
Blood is isotonic with
Calculate hardness of water in terms of $ {CaCO_3}$. Given $ {Ca(HCO3)2}$ = 0.81 gm, $ {Mg(HCO3)2}$ = 0.73 gm, Volume of solution = 100 ml
Calculate the mole fraction of ethylene glycol $(C_2H_6O_2)$ in a solution containing 20% of $C_2H_6O_2$ by mass.
Colligative properties depend on ___________.
Colligative properties of a solution depends upon
Concentration terms like mass percentage, ppm, mole fraction and molality do not depend on temperature. However, molarity is a function of temperature because
Cryoscopic constant of a liquid is
$CuSO_4.5H_2O$ is a
For a 1 molar solution of NaCl in water at 25$^\circ$C and 1 atm. pressure
For which of the following solutes the van?? Hoff factor is not greater than one?
$H_2S$ is a toxic gas used in qualitative analysis. If solubility of $H_2S$ in water at $STP$ is $0.195\, m$, what is the value of $K_H$ ?
How many grams of $NaOH$ are present in $250\, mL$ of $0.5 \,M\, NaOH$ solution?
How much oxygen is dissolved in $100\, mL$ water at $298\, K$ if partial pressure of oxygen is $0.5\, atm$ and $K_H = 1.4 \times 10^{-3}\, mol/L/atm$ ?