List of top Chemistry Questions on Solutions asked in AIIMS

When pressure is increased at constant temperature
The vapour pressure of a liquid decreases if some non-volatile solute is dissolved in it. The relative lowering of vapour pressure of a solution containing a non-volatile solute is equal to the mole fraction of the solute in the solution.
1 g of polymer having molar mass 1,60,000 g is dissolved in 800 mL water. Calculate the osmotic pressure in pascal at 27$^{\circ}$C. $(R \,= \,8.314\, J \,K^{-1}mole^{-1})$
Ethylene glycol is used as antifreeze to reduce freezing point of water to $-2.4^{\circ}\,C$. What mass of antifreeze is required for $2\, L$ water? $(K_f \,water\, = \,1.86\, K \,kg/mole)$
The depression in freezing point of $0.1\, M$ aqueous solutions of $HCl$, $CuSO_4$ and $K_2SO_4$ are in the ratio
Azeotropic mixtures are formed only by non-ideal solutions and they may have boiling points either greater than both the components or lesser than both the components. The composition of the vapour phase is same as that of the liquid phase of an azeotropic mixture.
Which of the following statement is true ?
An ideal solution obeys Raoult?? law. In an ideal solution, solute-solute as well as solvent-solvent interactions are similar to solute-solvent interactions.
The value of Henry�s constant K is
Boiling point of benzene is $353.23\, K$. When $1.8\, g$ of non-volatile solute is dissolved in $90\, g$ of benzene. Then boiling point is raised to $354.11\, K$. Given $K_b$ (benzene) = $2.53 \, kg\, mol^{-1}$. The molecular mass of non-volatile substance is
The solubility of a gas in a liquid increases with increase of pressure. The solubility of a gas in a liquid is directly proportional to the pressure of the gas.
The vapour pressure of two liquids $'P'$ and $'Q'$ are $80$ and $60$ torr respectively. The total vapour pressure of solution obtained by mixing $3$ mole of $P$ and $2$ mol of $Q$ would be
The equivalent weight of $H _{3} PO _{2}$, when it disproportionates into $PH _{3}$ and $H _{3} PO _{3}$ is
The molality of the solution does not change with change in temperature. The molality is expressed in units of moles per $1000\, g$ of solvent.
Stomach acid, a dilute solution of $HCl$ in water, can be neutralized by reaction with sodium hydrogen carbonate, $ {NaHCO_3_{(aq)} +HCL_{(aq)} ->NaCL_{(aq)} +H_2O_{(l)} +CO_2_{(g)} }$ How many milliliters of 0.125 M NaHCO solution are needed to neutralize 18.0 mL of 0.100 M HCL?
For a dilute solution, Raoult's law states that
When a concentrated solution is diluted by adding more water, molarity of the solution remains unchanged. Product of moles of a solute and volume is equal to the molarity.
The vapour pressure of pure benzene at a certain temperature is $0.850$ bar. A non-volatile, nonelectrolyte solid weighing $0.5\,g$ is added to $39.0\, g$ of benzene (molar mass 78 g/mol). The vapour pressure of the solution then is 0.845 bar. What is the molecular mass of the solid substance?
A $5 \%$ solution (by mass) of cane sugar in water has freezing point of $271 \,K$ and freezing point of pure water is $273.15 \,K$. The freezing point of a $5 \%$ solution (by mass) of glucose in water is
The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and $NH_4NO_3$ dissolves lowering the temperature. Addition of nonvolatile solute into solvent results into depression of freezing point of solvent.
A certain aqueous solution of $FeCl _{3}$ [formula mass $=162]$ has a density of $1.1 g / mL$ and contains $20.0 \% FeCl _{3} .$ Molar concentration of this solution is
$0.1\, M$ solution of glucose has same increment in the freezing point than $0.1\, M$ solution of urea. $K_f$ for both has same value.
Which of the following is a colligative property ?
Which of the following is a colligative property?
The equivalent weight of phosphoric acid $\left( H _{3} PO _{4}\right)$ in the reaction: $NaOH + H _{3} PO _{4} \rightarrow NaH _{2} PO _{4}+ H _{2} O$ is