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Previous year question hub

Solutions - Physical Chemistry - Chemistry Previous Year Questions

Practice Solutions - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

34Papers
32Years
42Questions
1Topics

Solutions question pattern

Every graph below is calculated only from this selection.

Questions by year

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

Difficulty distribution

How the classified questions are distributed by difficulty.

Medium 29 69%
Hard 6 14.3%
Easy 6 14.3%
Not classified 1 2.4%

Question type distribution

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

Numerical Answer Type (NAT) 17 40.5%
Subjective 12 28.6%
MCQ 11 26.2%
MSQ 2 4.8%

Subject weightage

Top subjects by unique question coverage.

Chemistry
42 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
42 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Solutions
42 Qs

Paper coverage

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

JEE Advanced 2026 Paper 2 Online
3 Qs
JEE ADVANCED 2025 PAPER 2 ONLINE
1 Qs
JEE ADVANCED 2024 PAPER 2 ONLINE
1 Qs
JEE ADVANCED 2023 PAPER 2 ONLINE
1 Qs
JEE ADVANCED 2022 PAPER 2 ONLINE
1 Qs
JEE ADVANCED 2021 PAPER 1 ONLINE
2 Qs
JEE ADVANCED 2020 PAPER 2 OFFLINE
1 Qs
JEE ADVANCED 2019 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2018 PAPER 1 OFFLINE
2 Qs
JEE ADVANCED 2017 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2017 PAPER 2 OFFLINE
1 Qs
JEE ADVANCED 2016 PAPER 2 OFFLINE
2 Qs
JEE ADVANCED 2016 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2015 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2014 PAPER 1 OFFLINE
1 Qs
IIT JEE 2012 PAPER 2 OFFLINE
1 Qs
IIT JEE 2011 PAPER 2 OFFLINE
1 Qs
IIT JEE 2009 PAPER 1 OFFLINE
1 Qs
IIT JEE 2008 PAPER 1 OFFLINE
3 Qs
IIT JEE 2007 PAPER 1 OFFLINE
1 Qs
IIT JEE 2006
1 Qs
IIT JEE 2005 SCREENING
1 Qs
IIT JEE 2004
1 Qs
IIT JEE 2000
1 Qs
IIT JEE 1999
1 Qs
IIT JEE 1998
1 Qs
IIT JEE 1996
1 Qs
IIT JEE 1993
1 Qs
IIT JEE 1991
1 Qs
IIT JEE 1990
2 Qs
IIT JEE 1989
1 Qs
IIT JEE 1986
1 Qs
IIT JEE 1983
1 Qs
IIT JEE 1981
1 Qs

Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
JEE Advanced 2026 Paper 2 Online20263View paper
JEE ADVANCED 2025 PAPER 2 ONLINE20251View paper
JEE ADVANCED 2024 PAPER 2 ONLINE20241View paper
JEE ADVANCED 2023 PAPER 2 ONLINE20231View paper
JEE ADVANCED 2022 PAPER 2 ONLINE20221View paper
JEE ADVANCED 2021 PAPER 1 ONLINE20212View paper
JEE ADVANCED 2020 PAPER 2 OFFLINE20201View paper
JEE ADVANCED 2019 PAPER 1 OFFLINE20191View paper
JEE ADVANCED 2018 PAPER 1 OFFLINE20182View paper
JEE ADVANCED 2017 PAPER 1 OFFLINE20171View paper
JEE ADVANCED 2017 PAPER 2 OFFLINE20171View paper
JEE ADVANCED 2016 PAPER 1 OFFLINE20161View paper
JEE ADVANCED 2016 PAPER 2 OFFLINE20162View paper
JEE ADVANCED 2015 PAPER 1 OFFLINE20151View paper
JEE ADVANCED 2014 PAPER 1 OFFLINE20141View paper
IIT JEE 2012 PAPER 2 OFFLINE20121View paper
IIT JEE 2011 PAPER 2 OFFLINE20111View paper
IIT JEE 2009 PAPER 1 OFFLINE20091View paper
IIT JEE 2008 PAPER 1 OFFLINE20083View paper
IIT JEE 2007 PAPER 1 OFFLINE20071View paper
IIT JEE 200620061View paper
IIT JEE 2005 SCREENING20051View paper
IIT JEE 200420041View paper
IIT JEE 200020001View paper
IIT JEE 199919991View paper
IIT JEE 199819981View paper
IIT JEE 199619961View paper
IIT JEE 199319931View paper
IIT JEE 199119911View paper
IIT JEE 199019902View paper
IIT JEE 198919891View paper
IIT JEE 198619861View paper
IIT JEE 198319831View paper
IIT JEE 198119811View paper

All Solutions previous year questions

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

1
1981 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1981
The vapour pressure of pure benzene is 639.7 mm of mercury and the vapour of a solution of a solute in benzene at the same temperature is 631.9 mm of mercury. Calculate this molality of the solution.
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2
1983 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1983
An organic compound CxH2yOy was burnt with twice the amount of oxygen needed for complete combustion of CO2 and H2O. The hot gases when cooled to 0oC and 1 atm pressure, measured 2.24 litres. The water collected during cooling weighed 0.9 g. The vapour pressure of pure water at 20oC is 17.5 mm Hg and is lowered by 0.104 mm when 50 g of the organic compound are dissolved in 1000 g of water. Give the molecular formula of the organic compound.
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3
1986 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1986
The vapour pressure of ethanol and methanol are 44.5 and 88.7 mm Hg respectively. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40 g of methanol. Calculate the total vapour pressure of the solution and the mole fraction of methanol in the vapour.
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4
1989 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1989
The vapour pressure of a dilute aqueous solution of glucose (C6H12O6) is 750 mm of mercury at 373 K. Calculate (i) molality, and (ii) mole fraction of the solution.
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5
1990 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1990
The vapour pressure of pure benzene at a certain temperature is 640 mm Hg. A non-volatile non-electrolyte solid weighing 2.175 g is added to 39.0 g of benzene. The vapour pressure of the solution is 600 mm Hg. What is the molecular weight of the solid substance?
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6
1990 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1990
The freezing point of equimolal aqueous solutions will be highest for
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7
1991 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1991
The degree of dissociation of calcium nitrate in a dilute aqueous solution, containing 7.0 g. of the salt per 100 gm of water at 100oC is 70%. If the vapour pressure of water at 100oC is 760 mm, calculate the vapour pressure of the solution.
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8
1993 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1993
What weight of the non-volatile solute, urea(NH2 - CO - NH2) needs to be dissolved in 100g of water, in order to decrease the vapour pressure of water by 25%? What will be the molality of the solution?
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9
1996 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1996
The molar volume of liquid benzene (density = 0.877 g mL-1) increases by a factor of 2750 as it vaporises at 20oC and that of liquid toluene (density = 0.867 g mL-1) increases by a factor of 7720 at 20oC. A solution of benzene and toluene at 20oC has vapour pressure of 46.0 Torr. Find the mole fraction of benzene in the vapour above the solution.
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10
1998 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1998
A solution of a nonvolatile solute in water freezes at -0.30oC. The vapour pressure of pure water at 298 K s 23.51 mm Hg and Kf for water is 1.86 K kg mol-1. Calculate the vapour pressure of this solution at 298 K.
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11
1999 · Chemistry · Physical Chemistry · Solutions
IIT JEE 1999
Nitrobenzene is formed as the major product along with a minor product in the reaction of benzene with a hot mixture of nitric acid and sulphuric acid. The minor product consists of carbon : 42.86 %, hydrogen : 2.40%, nitrogen : 16.67% and oxygen : 38.07% (i) Calculate the empirical formula of the minor product. (ii) When 5.5 g of the minor product is dissolved in 45 g of benzene, the boiling point of the solution is 1.84 oC higher than that of pure benzene. Calculate the molar mass of the minor product and determine its molecular and structural formula. (Molal boiling point elevation constant of benzene is 2.53 K kg mol-1)
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12
2000 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2000
To 500 cm3 of water, 3.0 \(\times\) 10-3 kg of acetic acid is added. If 23% of acetic acid is dissociated, what will be the depression in freezing point? Kf and density of water are 1.86 K kg-1 mol-1 and 0.997 g cm-3, respectively
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13
2004 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2004
1.22 g of benzoic acid is dissolved in 100 g of acetone and 100 g of benzene separately. Boiling point of the solution in acetone increases by 0.17 oC, while that in the benzene increases by 0.13oC; Kb for acetone and benzene is 1.7 K kg mol-1 and 2.6 K kg mol-1. Find molecular weight of the benzoic acid in two cases and justify your answer.
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14
2005 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2005 SCREENING
The elevation in boiling point of a solution of 13.44 g of CuCl2 in 1kg of water using the following information will be (Molecular weight of CuCl2 = 134.4 and Kb = 0.52 K molal-1)
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15
2006 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2006
75.2 g of C6H5OH (phenol) is dissolved in a solvent of Kf = 14. If the depression in freezing point is 7 K then find the % of phenol that dimerises.
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16
2007 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2007 PAPER 1 OFFLINE

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 :

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17
2008 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2008 PAPER 1 OFFLINE

The freezing point of the solution M is :

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18
2008 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2008 PAPER 1 OFFLINE

Water is added to the solution M such that the fraction of water in the solution becomes 0.9 mole. The boiling point of this solution is:

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19
2008 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2008 PAPER 1 OFFLINE

The vapour pressure of the solution M is :

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20
2009 · Chemistry · Physical Chemistry · Solutions
IIT JEE 2009 PAPER 1 OFFLINE

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 5 atm pressure is

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Showing 20 of 42 questions