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24 questions · Chemistry · JEE Advanced

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JEE Advanced
Chemistry
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24 questions · Chemistry · JEE Advanced

At 300 K , an ideal dilute solution of a macromolecule exerts osmotic pressure that is expressed in terms of the height $(h)$ of the solution (density $= 1.00 g cm^{- 3}$ ) where $h$ is equal to 2.00 cm . If the…2025 · Shift 2 · Q13 · Numerical
Vessel-1 contains $w_{2} g$ of a non-volatile solute $X$ dissolved in $w_{1} g$ of water. Vessel- 2 contains $w_{2} g$ of another non-volatile solute $Y$ dissolved in $w_{1} g$ …2024 · Shift 2 · Q9 · Numerical
$= 1.012 g mL^{- 1}$ of 0.2 molal urea solution (density $= 1.012 g mL^{- 1}$ at $250 mL$ ) is mixed with $0.06 g$ of a solution containing $0.06 g$ of urea. Both the solutions were prepared in…2023 · Shift 2 · Q12 · Numerical
An aqueous solution is prepared by dissolving $1.8 kg$ of an ionic salt in $3 5^{\circ} C$ of water at $3 5^{\circ} C$ . The salt remains $90%$ dissociated in the solution. The vapour pressure of the solution is $59.724 mm$ …2022 · Shift 2 · Q2 · Numerical
The boiling point of water in a 0.1 molal silver nitrate solution (solution A) is x $^{\circ}$ C. To this solution A, an equal volume of 0.1 molal aqueous barium chloride solution is added to make a new solution B. The difference in the…2021 · Shift 1 · Q10 · Numerical
The boiling point of water in a 0.1 molal silver nitrate solution (solution A) is x $^{\circ}$ C. To this solution A, an equal volume of 0.1 molal aqueous barium chloride solution is added to make a new solution B. The difference in the…2021 · Shift 1 · Q9 · Numerical
Liquids A and B form ideal solution for all compositions of A and B at 25 $^{\circ}$ C. Two such solutions with 0.25 and 0.50 mole fractions of A have the total vapour pressure of 0.3 and 0.4 bar, respectively. What is the vapour pressure…2020 · Shift 2 · Q14 · Numerical
On dissolving 0.5 g of a non-volatile non-ionic solute to 39 g of benzene, its vapor pressure decreases from 650 mmHg to 640 mmHg. The depression of freezing point of benzene (in K) upon addition of the solute is ............. (Given data:…2019 · Shift 1 · Q14 · Numerical
Liquids A and B form ideal solution over the entire range of composition. At temperature $T,$ equimolar binary solution of liquids $A$ and $B$ has vapor pressure $45 T or r .$ At the same temperature, a new solution of $A$ and $B$ having mole…2018 · Shift 1 · Q10 · Numerical
The plot given below shows $P - T$ curves (where $P$ is the pressure and $T$ is the temperature) for two solvents $X$ and $Y$ and isomolal solutions of $N a C l$ in these solvents. $N a C l$ completely dissociates in both the solvents. On addition… Includes diagram2018 · Shift 1 · Q14 · Numerical
For a solution formed by mixing liquids $L$ and $M,$ the vapor pressure of $L$ plotted against the mole fraction of $M$ in solution is shown in the following figure. Here $X_{L}$ and $X_{M}$ represent mole fractions of $L$ and $M,$ … Includes diagram2017 · Shift 1 · Q12 · Multiple correct
Pure water freezes at $273 K$ and $1$ bar. The addition of $34.5 g$ of ethanol to $500 g$ of water changes the freezing point of the solution. Use the freezing point depression constant of water as $2$ kg $m o l^{- 1} .$ The figures shown…2017 · Shift 2 · Q1 · MCQ
The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution at 298 K is 2.0 g cm–3 . The ratio of the molecular weights of the solute and solvent, $(\frac{M W _{so l u t e}}{M W _{so l v e n t}})$ …2016 · Shift 1 · Q3 · Numerical
The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of $K C l$ , $C H_{3} O H$ and CH3(CH2) $_{11}$ OSO $_{3}^{-}$ Na+ at room temperature. The… Includes diagram2016 · Shift 2 · Q12 · MCQ
Mixture (s) showing positive deviation from Raoult’s law at 35oC is (are)2016 · Shift 2 · Q3 · Multiple correct
If the freezing point of a 0.01 molal aqueous solution of a cobalt (III) chloride-ammonia complex(which behaves as a strong electrolyte) is – 0.0558oC, the number of chloride(s) in the coordination sphere of the complex is [Kf of water =…2015 · Shift 1 · Q4 · Numerical
$M X_{2}$ dissociates in $M^{2 +}$ and $X^{-}$ ions in an aqueous solution, with a degree of dissociation ( $α$ ) of 0.5. The ratio of the observed depression of freezing point of the aqueous solution to the value of the depression of…2014 · Shift 1 · Q4 · Numerical
For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water. the elevation in boiling point at 1 atm pressure is 2oC. Assuming concentration of solute is much lower than the concentration of solvent,…2012 · Shift 2 · Q4 · MCQ
The freezing point (in oC) of a solution containing 0.1 g of $K_{3} [F e (C N)_{6}]$ (Mol. wt. 329) in 100 g of water (Kf = 1.86 K kg mol-1) is2011 · Shift 2 · Q4 · MCQ
The Henry's law constant for the solubility of N $_{2}$ gas in water at 298 K is 1.0 $\times$ 10 $^{5}$ atm. The mole fraction of N $_{2}$ in air is 0.8. The number of moles of N $_{2}$ from air dissolved in 10 moles of water at 298 K and…2009 · Shift 1 · Q5 · MCQ
Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are…2008 · Shift 1 · Q21 · MCQ
Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are…2008 · Shift 1 · Q22 · MCQ
Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are…2008 · Shift 1 · Q23 · MCQ
When 20 g of naphthoic acid (C $_{11}$ H $_{8}$ O $_{2}$ ) is dissolved in 50 g of benzene in 50 g of benzene (K $_{f}$ = 1.72 K kg mol $^{- 1}$ ), a freezing point depression of 2 K is observed. The van't Hoff factor (i) is :2007 · Shift 1 · Q8 · MCQ