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Previous year question hub

Colligative Properties - Chemical Equilibria - Life Sciences Previous Year Questions

Practice Colligative Properties - Chemical Equilibria - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

8Papers
8Years
8Questions
1Topics

Colligative Properties question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Colligative Properties. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 7 87.5%
Medium 1 12.5%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Numerical Answer Type (NAT) 5 62.5%
MCQ 3 37.5%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
8 Qs

Most asked topics

Top topics across the included previous year papers.

Chemical Equilibria
8 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Colligative Properties
8 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Life Sciences (XL) 2025
1 Qs
Life Sciences (XL) 2023
1 Qs
Life Sciences (XL) 2022
1 Qs
Life Sciences (XL) 2021
1 Qs
Life Sciences (XL) 2016
1 Qs
Life Sciences (XL) 2014
1 Qs
Life Sciences (XL) 2011
1 Qs
Life Sciences (XL) 2008
1 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 202520251View paper
Life Sciences (XL) 202320231View paper
Life Sciences (XL) 202220221View paper
Life Sciences (XL) 202120211View paper
Life Sciences (XL) 201620161View paper
Life Sciences (XL) 201420141View paper
Life Sciences (XL) 201120111View paper
Life Sciences (XL) 200820081View paper

All Colligative Properties previous year questions

Practice every matching question in batches of 20, with every available option.

1
2008 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2008
1 g \(L^{-1}\) solution of a protein exerts an osmotic pressure of \(8.3 \times 10^{-3}\) bar at 300 K. Calculate the molar mass of the protein.
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2
2011 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2011
The solubility of sodium bicarbonate in water is 9.6 g/100 g at 20 °C and 16.4 g/100 g at 60 °C. If a saturated solution of sodium bicarbonate at 60 °C is cooled to 20 °C, the percentage of the dissolved salt crystallized out will be
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3
2014 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2014
Assuming ideal condition, the solution that has the highest freezing point is
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4
2016 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2016
When 1.0 g of urea (Molecular Weight = 60) is dissolved in 200 g of solvent S, the freezing point of S is lowered by 0.25 °C. When 1.5 g of a non-electrolyte Y is dissolved in 125 g of S, the freezing point of S is lowered by 0.20 °C. The molecular weight of Y is ______________.
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5
2021 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2021
The freezing point of 80 g of acetic acid (freezing point constant 3.9 K kg mol⁻¹) was lowered by 7.8 K due to the addition of 20 g of a compound. The molar mass of the compound is ________ g mol⁻¹ (rounded off to closest integer).
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6
2022 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2022
A sample of benzene, contaminated with a non-volatile and non-ionic solute, boils at 0.31°C higher than that of pure benzene. The molality of the solute in the contaminated solution is ______ (round off to two decimal places). Given: Gas constant = 8.314 J K−1 mol−1, Molecular weight of benzene is 78.11 g mol−1, Normal boiling point of benzene is 80.1°C, Enthalpy of vaporization of benzene is 30.76 kJ mol−1
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7
2023 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2023

The depression of freezing point of water (in K) for 0.1 molal solutions of NaCl and Na2SO4 are ΔT1 and ΔT2, respectively. Assuming the solutions to be ideal, the ratio ΔT1/ΔT2 is __________ (rounded off to two decimal places).

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8
2025 · Life Sciences · Chemical Equilibria · Colligative Properties
Life Sciences (XL) 2025
A non-volatile solute has a molecular weight of 180 g mol⁻¹. Assume that the solute does not associate or dissociate in water, and the boiling-point constant (ebullioscopic constant) of water is 0.51 K kg mol⁻¹.
The amount (in g) of solute added to 500 g of water to elevate the boiling point by 0.153 K is ______. (answer in integer)
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