IISER 2026 Question Paper (OUT): Subject-Wise Questions & High Weightage Topics

IAT 2026 Question Paper Analysis: Based on the feedback received from students who appeared for the IISER Aptitude Test 2026, the overall difficulty level of the examination was moderate. While Biology was largely considered easy and NCERT-based, Physics emerged as the most challenging section for many candidates. Mathematics received mixed reactions, ranging from easy to tough depending on the student's background and preparation level.

This IISER 2026 Question Paper Analysis brings a complete breakdown of the exam, including subject-wise difficulty levels, important topics, and high-weightage chapters from Physics, Chemistry, Mathematics, and Biology, helping candidates assess their performance and predict their admission chances.

Read this SciAstra blog to get complete insight on the IAT 2026 Question paper analysis, subject-wise number of difficult questions, high weightage topics and other details from here:

IAT 2026 Question Paper (OUT)

IISER 2026 exam was conducted by the exam officials; therefore, the IAT 2026 question paper is now available. This section is updated as the officials release the IISER 2026 question paper and its answer key.

IAT 2026 Full Question Paper Soluntion

Candidates can check out the IAT 2026 full question paper solution here:

IISER 2026 Full Question Paper & Solution Analysis

IISER 2026 Exam Analysis

Overall IAT 2026 Exam Highlights

Key Trends Observed in IAT 2026

1. Physics Required Strong Analytical Skills

Unlike direct formula-based questions, many Physics problems required candidates to apply concepts in unfamiliar situations. Students consistently reported that Physics demanded greater analytical and critical-thinking abilities compared to the other sections.

2. Biology Was Highly Scoring

Biology remained the most student-friendly section. A significant number of questions were based on NCERT concepts, allowing well-prepared candidates to attempt the section confidently and accurately.

3. Mathematics Was Easier Than JEE Level

Students generally agreed that the Mathematics section was less difficult than JEE Main-level Mathematics. Topics such as Functions, Continuity, Matrices, and Probability had notable representation in the paper.

4. Chemistry Focused on Conceptual Understanding

Although Chemistry was not considered difficult, many students described it as lengthy. The section emphasized conceptual understanding and application rather than direct factual recall.

5. Class 11 Topics Had Higher Weightage

One of the most prominent observations from candidates was the stronger presence of Class 11 concepts across multiple subjects, particularly Physics and Mathematics.

IAT 2026 Difficulty Distribution Across Subjects

Based on the collective student feedback, IAT 2026 was a well-balanced examination that prioritized conceptual understanding over memorization. The paper was neither exceptionally difficult nor overly straightforward, making it accessible to well-prepared candidates while still differentiating top performers through analytical and application-based questions.

Students with strong NCERT preparation in Biology and Chemistry, coupled with a solid grasp of Class 11 fundamentals and problem-solving skills in Physics and Mathematics, were likely to perform well. Therefore, the overall difficulty level of IAT 2026 can be confidently classified as Moderate, with Physics being the primary differentiating factor among candidates.

IISER 2025 Exam Analysis

Based on student reactions, memory-based papers, and expert analyses, the overall IAT exam 2025 was of a moderate difficulty level, with Physics being the toughest section and Biology being the most scoring section.

IAT 2025 Difficulty Level Analysis

Also Read: IAT 2026 Important Topics

Subject-wise Question Paper Analysis

Physics Analysis

Physics emerged as the most challenging section in IAT 2025. Questions focused more on conceptual understanding rather than direct formula application. Topics such as Electrostatics, Rotational Motion, Waves, and Modern Physics received higher weightage. Many candidates reported that Physics consumed the maximum time during the examination.

Chemistry Analysis

Chemistry was largely NCERT-oriented and balanced across Organic, Inorganic, and Physical Chemistry. Questions from Chemical Bonding, Coordination Compounds, Electrochemistry, and Aldehydes & Ketones were prominent. Students generally considered Chemistry one of the more manageable sections.

Mathematics Analysis

The Mathematics section was moderate in difficulty. Questions were distributed across Calculus, Functions, Probability, Vectors, and Coordinate Geometry. While most questions were solvable, some required lengthy calculations and strong analytical skills.

Biology Analysis

Biology was the easiest and most scoring section for many candidates. Most questions were directly based on NCERT concepts, particularly from Genetics, Molecular Biology, Human Physiology, Cell Biology, and Plant Physiology. Candidates with NEET preparation found this section relatively straightforward.

IAT 2025 Question Paper

IISER 2025 exam was conducted on May 25, 2026, at multiple exam centres across the nation. Candidates appearing for the academic session 2026-2027 exam must check out the IAT 2025 question paper to know the exam difficulty level, exam pattern, high-weightage questions and other details.

Check out the IISER 2025 question paper from here:

IAT 2026 Safe Score

Candidates targeting the IAT exam for this academic session, before entering the examination hall and taking up the exam, must know the IAT 2026 safe score, so that they plan it accordingly.

Check out the IISER 2026 Safe Score Institute-wise from here:

Also Read: What is IAT 2026 Good Score?