4AB › Chemistry - Tools
Chemistry - Tools
Explore · Learn · Practice · ExcelPractise, look up and calculate — the working tools of chemistry.
11 things to open
Dreamers Quiz
Free chemistry quizzes
Interactive Periodic Table
A premium, interactive periodic table of all 118 elements. Tap any element for atomic mass, electron configuration, physical and chemical data — then open…
Chemistry Calculator
Free online calculator suite for chemistry, physics, maths and accounting — molar mass, equation balancer, periodic table, pH, kinematics, derivatives and more.
Symmetry Lab
Point groups in 3D
Crystal Lab
Unit cells & structures in 3D
Chemistry Typing
Formulas & equations for Word
Chemistry Draw
Draw structures & reactions online
Chemistry Family Tree & Scientists
Who taught whom among 350 great chemists — pick any chemist to see teachers above and students below, then read the discovery explained for JAM, NET and GATE and the life story. Two posts per chemist, a new one every hour.
Chemistry Community
Students, tutors, researchers, study groups and events near you — filter by subject, level, year, institution and city. Opt-in and reviewed.
Syllabus
Official syllabus links of Indian universities
Questions by topic
Every question with its answer, chapter by chapter
Organic, inorganic and physical chemistry
Each branch: its previous-year questions chapter by chapter, the concept notes that explain them, and the tools to check your working.
Organic chemistry180 previous-year questions
Mechanisms, stereochemistry, pericyclic reactions and spectroscopy — practise the PYQs, then read the concept notes.
Inorganic chemistry987 previous-year questions
Coordination, organometallic and main-group chemistry with the periodic table beside them.
Physical chemistry910 previous-year questions
Quantum chemistry, thermodynamics, kinetics and electrochemistry — numericals with the calculators that check them.
All 2,077 chemistry PYQs are on questions by chapter and by exam and year; the question bank adds practice and the AI answer checker. Read the concept notes and the calculator knowledge base, open all 68 calculator tools, the periodic table or the Symmetry Lab. Beyond chemistry: all free tools, projects and everything on 4AB.
Chemistry previous-year questions by exam · CSIR NET Chemistry PYQs, every paper and question