List of top Chemistry Questions

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

$K_H$ values for $Ar_(g)$, $CO_{2(g)}$, $HCHO_{(g)}$ and $CH_{4(g)}$ are $40.39$, $1.67$, $1.83 \times 10^{-5}$ and $0.413$ respectively. Arrange these gases in the order of their increasing solubility.

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to ___________.

Moles of $K_2SO_4$ to be dissolved in 12 moles of water to lower its vapour pressure by 10 mm Hgat a temperature at which vapour pressure of pure water is 50 mmHg is

Out Of NaCl, ZnS, CaF2 and CsCl, in which case the cations form ccp structure?

Out of the following the NOT reversible process is