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Chemistry - Solutions

Practise 6 IAT (IISER) previous year questions on Solutions, compiled from papers spanning 2017 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.

Solutions has been asked in 6 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 6 questions in all. 17% of them were easy, 67% moderate and 17% tough. Most of its questions came from 2026, with 1 question that year. In the last three years (2023–2026) it had 3 questions across 3 papers, about 1 per paper.

The chapter's 3 topics are not weighted equally: Vapour pressure and raoult's law (3 questions, 50%), Colligative Properties and Abnormal Molecular Masses (2 questions, 33%), and Solubility and Concentration of Solutions (1 question, 17%) have been asked the most. Vapour pressure and raoult's law has also led over the last five years, with 2 questions. Vapour pressure and raoult's law has produced the most tough questions (1).

  1. 1For two pure volatile liquids X and Y , attractive intermolecular interactions of both X - X and Y - Y are weaker than those of X - Y . The 2026Vapour pressure and raoult's law
  2. 2Which one of the following plots correctly describes the variation of osmotic pressure ( ) of a fixed amount of a solute against the volume 2024Colligative Properties and Abnormal Molecular Masses
  3. 3In two solutions X (hexane and benzene) and Y (water and HCl ), what types of deviations from Raoult's law are observed?2023Vapour pressure and raoult's law
  4. 42 g of naphthoic acid (molecular weight ) dissolved in 20 mL of benzene shows a freezing point depression of 2 K. For benzene, the freezing 2022Colligative Properties and Abnormal Molecular Masses
  5. 5At 298 K, the vapour pressure of an ideal solution containing 1 mol of liquid \( {L} 1\) and 2 mol of liquid \( {L} 2\) is 500 mm Hg. When 22018Vapour pressure and raoult's law
  6. 6Density of 3 M solution of NaCl is . Calculate the volume of water required to make 1000 mL of this NaCl solution. [Consider the density of 2017Solubility and Concentration of Solutions

Frequently Asked Questions

1.How many questions are available for Solutions?

This chapter includes 6 questions compiled from IAT (IISER) papers spanning 2017 to 2026.

2.Are these questions only from IAT (IISER), or from other exams too?

These are IAT (IISER) questions specifically for the Solutions chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Solutions an important chapter for IAT (IISER) Chemistry?

Solutions has appeared in 6 of the 10 years of IAT (IISER) papers covered here, with 6 questions across 6 papers - about one per paper it appears in.

4.What is the difficulty level of Solutions questions in IAT (IISER)?

Of the 6 questions analysed for this chapter, 17% are easy, 67% moderate and 17% tough. 2026 had the most, with 1 question.

5.Which topics in Solutions should I focus on?

These topics have carried the most weightage in Solutions:

  • Vapour pressure and raoult's law - 3 questions (50%)
  • Colligative Properties and Abnormal Molecular Masses - 2 questions (33%)
  • Solubility and Concentration of Solutions - 1 question (17%)
  • Vapour pressure and raoult's law has produced the most tough questions (1).
6.Is Solutions's weightage in IAT (IISER) going up or down?

Across all 6 papers analysed, Solutions has averaged about 1.0 questions per paper. In the last three years (2023–2026), that average has stayed about the same, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.