CBSE Class 9 and 10 Chemistry: revision path with simulations

The chemistry chapters of CBSE Science (086) for Classes 9 and 10 in syllabus order. Each topic links to simulations that show it working; the practicals from the lab manual are marked, and the Class 10 topics are the ones assessed in the board exam.

33 topics · 45 simulations · 8 practicals

Class 9

Concentration (mass and volume percentage) and solubility curves IX Ch 5 Exploring Mixtures and their Separation
- Preparing solutions – percentage concentration, molar concentration and dilution
- Dissolving at particle level – hydration, like dissolves like and enthalpy of solution
Separation: crystallisation, distillation, chromatography, sublimation, centrifugation, coagulation IX Ch 5 Exploring Mixtures and their Separation
Separating funnel, paper chromatography of ink, sublimation, coagulation with alum PracticalIX Practical 2
- Separating mixtures: decanting, filtration, evaporation, separating funnel, distillation
- Organic compound separation – distillation, extraction, TLC and paper chromatography
Subatomic particles; Thomson, Rutherford and Bohr models IX Ch 8 Structure of an Atom
- Rutherford scattering – alpha particles, the nucleus and the Thomson model
- Bohr atomic model and mini periodic table (Z = 1–20)
Electron distribution in shells (K, L, M) and valency IX Ch 8 Structure of an Atom
- Bohr atomic model and mini periodic table (Z = 1–20)
- Electron Configuration – Atoms Z = 1–36
Atomic number, mass number, isotopes and isobars IX Ch 8 Structure of an Atom
- Build an atom – protons, neutrons, electrons, ions and isotopes
- Isotopes and atomic mass – mass number, abundance and average atomic mass
Laws of conservation of mass and constant proportions; Dalton's theory IX Ch 9 Atoms and Molecules
- Physical and chemical changes – evidence bench
- Reactants, products and leftovers – sandwiches and molecules
Molecules, ions and writing chemical formulae IX Ch 9 Atoms and Molecules
- Building molecules – atoms, valence, formulas and 3D shapes
- Ionic and Covalent Bonding – NaCl, MgO, H₂, O₂, H₂O, CH₄, NH₃
Molecular mass and formula unit mass IX Ch 9 Atoms and Molecules
- Elements and compounds in 3D – molecular models, formulae and molecular mass
Verify the law of conservation of mass in a chemical reaction PracticalIX Practical 3
- Physical and chemical changes – evidence bench

Class 10

Writing and balancing chemical equations Exam topicX Ch 1 Chemical Reactions and Equations
- Balancing chemical equations – coefficients, molecule models and practice game
Combination, decomposition, displacement, double displacement and precipitation reactions Exam topicX Ch 1 Chemical Reactions and Equations
- Reactions in solution bench – precipitation, acid–base, redox and net ionic equations
- Metal reactivity series – dropping metal into solution
Exothermic and endothermic reactions Exam topicX Ch 1 Chemical Reactions and Equations
- Reaction energy diagram – exothermic vs endothermic
Oxidation and reduction; corrosion and rancidity Exam topicX Ch 1 Chemical Reactions and Equations
- Electrochemical corrosion of metals (Fe–Cu, Fe–Zn, Fe–Sn) and sacrificial protection
- Balancing redox equations – the electron balance method
Classify reactions: quicklime + water, heating FeSO₄, iron nails in CuSO₄, Na₂SO₄ + BaCl₂ PracticalExam topicX Practical 2
- Metal reactivity series – dropping metal into solution
- Reactions in solution bench – precipitation, acid–base, redox and net ionic equations
Indicators; reactions of acids and bases with metals, carbonates and each other Exam topicX Ch 2 Acids, Bases and Salts
- Acid–base indicators – litmus, phenolphthalein, red cabbage, universal indicator
- Reactions of dilute acids – metals, carbonates, bases and alkalis
pH scale and its importance in everyday life Exam topicX Ch 2 Acids, Bases and Salts
- pH scale – measuring and mixing acids and bases
Salts: NaOH (chlor-alkali), bleaching powder, baking soda, washing soda, plaster of Paris; water of crystallisation Exam topicX Ch 2 Acids, Bases and Salts
- Electrolysis of Aqueous Solutions with Inert Electrodes
- Empirical formula lab – magnesium oxide, water of crystallisation and combustion analysis
pH of dilute HCl, dilute NaOH, ethanoic acid, lemon juice, water and dilute sodium hydrogencarbonate solution PracticalExam topicX Practical 1A
- pH scale – measuring and mixing acids and bases
- Acid–base solutions – strong vs weak and measuring pH
Properties of HCl and NaOH with litmus, zinc and sodium carbonate PracticalExam topicX Practical 1B
- Reactions of dilute acids – metals, carbonates, bases and alkalis
- Acid–base indicators – litmus, phenolphthalein, red cabbage, universal indicator
Properties of metals and non-metals; reactivity series Exam topicX Ch 3 Metals and Non-metals
- Metal reactivity series – dropping metal into solution
- Metals in salt solutions – predicting reactions from standard electrode potentials
Formation and properties of ionic compounds Exam topicX Ch 3 Metals and Non-metals
- Ionic vs covalent bonding – atomic models (NaCl, MgO, Cl₂, HCl, H₂O, CO₂, N₂)
- Ionic and Covalent Bonding – NaCl, MgO, H₂, O₂, H₂O, CH₄, NH₃
Basic metallurgy: concentration, roasting, calcination, reduction, electrolytic refining Exam topicX Ch 3 Metals and Non-metals
- Extracting metals – carbon reduction, the blast furnace, electrolysis of alumina and bio-extraction
- Galvanic cells and electrolysis – standard electrode potentials
Corrosion and its prevention Exam topicX Ch 3 Metals and Non-metals
- Electrochemical corrosion of metals (Fe–Cu, Fe–Zn, Fe–Sn) and sacrificial protection
Reactions of Zn, Fe, Cu and Al with ZnSO₄, FeSO₄, CuSO₄ and Al₂(SO₄)₃ solutions; arrange the metals in order of reactivity PracticalExam topicX Practical 3
- Metal reactivity series – dropping metal into solution
Döbereiner's triads, Newlands' octaves, Mendeléev's table, modern periodic table and trends X Reading material (formative): Periodic Classification
- Periodic table structure – cells, periods and groups
- Periodic trends (atomic radius, electronegativity, ionisation energy)
Covalent bonding in carbon; catenation and isomers Exam topicX Ch 4 Carbon and its Compounds
- Alkane and alkene molecules – 3D ball-and-stick models
- Structural isomers of alkanes C₄–C₇ and boiling points
- 3D Hydrocarbon Models – Alkanes, Alkenes, Alkynes, Benzene, and Br₂ Addition
Homologous series and nomenclature with functional groups Exam topicX Ch 4 Carbon and its Compounds
- 3D Functional Groups – Identify Alcohols, Aldehydes, Ketones, Acids, Esters, Amines and Amides
Combustion, oxidation, addition and substitution reactions Exam topicX Ch 4 Carbon and its Compounds
- Enthalpy of combustion – spirit-burner calorimetry, food energy, bomb calorimeter and fuel comparison
- Cracking and Alkenes – Virtual Lab, Equations and Addition Reactions
- Free-Radical Substitution – Halogenation of Alkanes
Ethanol and ethanoic acid; esterification Exam topicX Ch 4 Carbon and its Compounds
- Alcoholic and Acetic Fermentation – Esterification
- Reversible Esterification and the Silver Mirror Test
Soaps, detergents and micelles Exam topicX Ch 4 Carbon and its Compounds
- Fat saponification and how soap micelles clean
Acetic acid: odour, solubility, litmus, reaction with sodium hydrogencarbonate PracticalExam topicX Practical 8
- Reactions of dilute acids – metals, carbonates, bases and alkalis
- Strong vs Weak Acids – Same Concentration, What Differs?
Compare the cleaning capacity of a soap in soft and hard water PracticalExam topicX Practical 9
- Group 1/2 flame colors and water hardness treatment
- Fat saponification and how soap micelles clean

Topics follow the published curriculum; the mapping to simulations is by Simulic. Simulic is not affiliated with CBSE or NCERT.