List of top Chemistry Questions

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 $K_H = 1.4 \times 10^{-3}\, mol/L/atm$ ?

Human blood has an osmotic pressure of 7 .65 atm. at body temperature (37$^\circ$C). Hence molarity of an to have same osmotic pressure,will be

If 0.5 m solution of $Ca(NO_3)_2$ and 0.75 m solution of KOH is taken, then the depression in freezing point is

If 100 mL of 10 M NaOH solution is diluted to 1.0 L,the resulting solution contains

If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is

In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking $K_f$ for water as 1.85, the freezing point of the solution will be nearest to