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Syllabus · CBSE · Classes 7 to 10

Every chemical formula and equation in the CBSE syllabus.

A CBSE student meets around 75 chemical formulas and 70 chemical equations between Class 7 and Class 10. Writing a chemical formula is not explained until Class 9, and writing and balancing a chemical equation not until Class 10 — by which point both have been set in exercises for two years.

Board
Central Board of Secondary Education
Classes covered
Classes 7 to 10
Chemical formulas
79 listed below
Chemical equations
70 listed below
Writing a formula is taught
Class 9, Chapter III — Atoms and Molecules
Balancing is taught
Class 10, Chapter I — Chemical Reactions and Equations

The gap. Formulas and equations both appear from Class 7. Writing a formula is explained in Class 9 and balancing in Class 10.

Compiled by the author from the board’s own textbooks, chapter by chapter. Equations are recorded as the textbook sets them; where one is printed without being balanced it is marked as such and left as printed. Have a teacher confirm the list against the current edition before it is sent to a school.

Class 7

Chapter V — Acids, Bases and Salts

Chemical formulas — 3

  1. 1 HCl
  2. 2 NaOH
  3. 3 NaCl
Chemical equations set in Chapter V — Acids, Bases and Salts
No. Equation Condition
1 HCl NaOH → NaCl H2O —

Chapter VI — Physical and Chemical Changes

Chemical formulas — 6

  1. 4 MgO
  2. 5 Mg(OH)2
  3. 6 CO2
  4. 7 Ca(OH)2
  5. 8 CaCO3
  6. 9 Fe2O3
Chemical equations set in Chapter VI — Physical and Chemical Changes
No. Equation Condition
2 Mg O2 → MgO Printed unbalanced —
3 MgO H2O → Mg(OH)2 —
4 CO2 Ca(OH)2 → CaCO3 H2O —
5 Fe O2 H2O → Fe2O3 Printed unbalanced —

Class 8

Chapter IV — Metals and Non-metals

Chemical formulas — 6

  1. 10 Cu(OH)2
  2. 11 CuCO3
  3. 12 SO2
  4. 13 H2SO3
  5. 14 CuSO4
  6. 15 ZnSO4
Chemical equations set in Chapter IV — Metals and Non-metals
No. Equation Condition
6 2Cu H2O CO2 O2 → Cu(OH)2 CuCO3 —
7 SO2 H2O → H2SO3 —
8 CuSO4 Zn → ZnSO4 Cu —
Names that cannot be turned back into a formula, because the element has a variable valency
Formula Name given Correct name
Cu(OH)2 Copper Hydroxide Copper(II) Hydroxide, or Cupric Hydroxide
CuCO3 Copper Carbonate Copper(II) Carbonate, or Cupric Carbonate
CuSO4 Copper Sulphate Copper(II) Sulphate, or Cupric Sulphate

Class 9

Chapter III — Atoms and Molecules

Chemical formulas — 24

  1. 16 H2S
  2. 17 CCl4
  3. 18 MgCl2
  4. 19 Al2O3
  5. 20 CaO
  6. 21 NaNO3
  7. 22 Na2CO3
  8. 23 (NH4)2SO4
  9. 24 CaCl2
  10. 25 Na2O
  11. 26 AlCl3
  12. 27 Na2S
  13. 28 Al2(SO4)3
  14. 29 K2SO4
  15. 30 KNO3
  16. 31 Cu(NO3)2
  17. 32 HNO3
  18. 33 Na2SO3
  19. 34 NH3
  20. 35 CH3OH
  21. 36 ZnO
  22. 37 K2CO3
  23. 38 Na2SO4
  24. 39 Na3PO4

Class 10

Chapter I — Chemical Reactions and Equations

Chemical formulas — 26

  1. 40 Fe3O4
  2. 41 CO
  3. 42 BaCl2
  4. 43 BaSO4
  5. 44 SO3
  6. 45 FeSO4
  7. 46 Pb(NO3)2
  8. 47 PbO
  9. 48 NO2
  10. 49 AgCl
  11. 50 AgBr
  12. 51 CuCl2
  13. 52 PbCl2
  14. 53 CuO
  15. 54 MnO2
  16. 55 MnCl2
  17. 56 KOH
  18. 57 Ca(NO3)2
  19. 58 H2SO4
  20. 59 AgNO3
  21. 60 Zn(NO3)2
  22. 61 KBr
  23. 62 BaI2
  24. 63 KI
  25. 64 BaBr2
  26. 65 ZnCO3
Chemical equations set in Chapter I — Chemical Reactions and Equations
No. Equation Condition
9 Zn H2SO4 → ZnSO4 H2 —
10 3Fe 4H2O → Fe3O4 4H2 steam
11 CO 2H2 → CH3OH —
12 H2 Cl2 → 2HCl —
13 3BaCl2 Al2(SO4)3 → 3BaSO4 2AlCl3 —
14 2Na 2H2O → 2NaOH H2 —
15 BaCl2 Na2SO4 → BaSO4 2NaCl —
16 CaO H2O → Ca(OH)2 —
17 C O2 → CO2 —
18 2H2 O2 → 2H2O —
19 CH4 2O2 → CO2 2H2O —
20 2FeSO4 → Fe2O3 SO2 SO3 heat
21 CaCO3 → CaO CO2 heat
22 2Pb(NO3)2 → 2PbO 4NO2 O2 heat
23 2AgCl → 2Ag Cl2 sunlight
24 2AgBr → 2Ag Br2 sunlight
25 Fe CuSO4 → FeSO4 Cu —
26 Pb CuCl2 → PbCl2 Cu —
27 2Cu O2 → 2CuO —
28 CuO H2 → Cu H2O —
29 ZnO C → Zn CO —
30 MnO2 4HCl → MnCl2 2H2O Cl2 —
31 4Na O2 → 2Na2O —
32 2PbO C → 2Pb CO2 —
33 Fe2O3 2Al → Al2O3 2Fe —
34 2NaOH H2SO4 → Na2SO4 2H2O —
35 3H2 N2 → 2NH3 —
36 2H2S 3O2 → 2H2O 2SO2 —
37 2K 2H2O → 2KOH H2 —
38 2HNO3 Ca(OH)2 → Ca(NO3)2 2H2O —
39 NaCl AgNO3 → AgCl NaNO3 —
40 BaCl2 H2SO4 → BaSO4 2HCl —
41 Zn 2AgNO3 → Zn(NO3)2 2Ag —
42 2Al 3CuCl2 → 2AlCl3 3Cu —
43 BaCl2 K2SO4 → BaSO4 2KCl —
44 2KBr BaI2 → 2KI BaBr2 —
45 ZnCO3 → ZnO CO2 —
46 Mg 2HCl → MgCl2 H2 —
Names that cannot be turned back into a formula, because the element has a variable valency
Formula Name given Correct name
Pb(NO3)2 Lead Nitrate Lead(II) Nitrate, or Plumbous Nitrate
PbO Lead Oxide Lead(II) Oxide, or Plumbous Oxide
FeSO4 Iron Sulphate Iron(II) Sulphate, or Ferrous Sulphate
CuCl2 Copper Chloride Copper(II) Chloride, or Cupric Chloride
PbCl2 Lead Chloride Lead(II) Chloride, or Plumbous Chloride

Chapter II — Acids, Bases and Salts

Chemical formulas — 7

  1. 66 CH3COOH
  2. 67 Na2ZnO2
  3. 68 NaHCO3
  4. 69 Ca(HCO3)2
  5. 70 CaOCl2
  6. 71 NH4Cl
  7. 72 FeCl2
Chemical equations set in Chapter II — Acids, Bases and Salts
No. Equation Condition
47 2NaOH Zn → Na2ZnO2 H2 —
48 Na2CO3 2HCl → 2NaCl H2O CO2 —
49 NaHCO3 HCl → NaCl H2O CO2 —
50 CaCO3 H2O CO2 → Ca(HCO3)2 —
51 2NaCl 2H2O → 2NaOH Cl2 H2 electrolysis
52 Ca(OH)2 Cl2 → CaOCl2 H2O —
53 NaCl H2O CO2 NH3 → NH4Cl NaHCO3 —
54 2NaHCO3 → Na2CO3 H2O CO2 heat
55 2Al 3H2SO4 → Al2(SO4)3 3H2 —
56 Fe 2HCl → FeCl2 H2 dilute acid

Chapter III — Metals and Non-metals

Chemical formulas — 7

  1. 73 NaAlO2
  2. 74 K2O
  3. 75 HgS
  4. 76 HgO
  5. 77 Cu2S
  6. 78 Cu2O
  7. 79 ZnS
Chemical equations set in Chapter III — Metals and Non-metals
No. Equation Condition
57 4Al 3O2 → 2Al2O3 —
58 Al2O3 6HCl → 2AlCl3 3H2O —
59 Al2O3 2NaOH → 2NaAlO2 H2O —
60 Na2O H2O → 2NaOH —
61 K2O H2O → 2KOH —
62 Ca 2H2O → Ca(OH)2 H2 —
63 2Al 3H2O → Al2O3 3H2 —
64 2HgS 3O2 → 2HgO 2SO2 —
65 2HgO → 2Hg O2 heat
66 Fe 2HCl → FeCl2 H2 dilute acid
67 2Cu2O Cu2S → 6Cu SO2 —
68 2ZnS 3O2 → 2ZnO 2SO2 —
69 3MnO2 4Al → 3Mn 2Al2O3 —
70 S O2 → SO2 —

Questions

How many chemical formulas and equations are in the CBSE syllabus for Classes 7 to 10?
About 75 chemical formulas and 70 chemical equations. The chapter-by-chapter list on this page enumerates every one of them, with the chapter each appears in.
When does CBSE teach a student to write a chemical formula?
Class 9, Chapter III — Atoms and Molecules. Formulas are set in exercises from Class 7.
When does CBSE teach a student to balance a chemical equation?
Class 10, Chapter I — Chemical Reactions and Equations. Equations are set from Class 7, and Class 7 Chapter VI prints two that are not balanced.
What is the correct chemical name of CuSO4?
Copper(II) Sulphate, also called cupric sulphate. The textbook prints “Copper Sulphate”, which cannot be turned back into a formula because copper has a variable valency.
Is Fe2O3 iron oxide?
No. Fe2O3 is Iron(III) Oxide, or ferric oxide. Iron oxide is Fe3O4.

This is the gap the Playbook was written for.

The Language of Chemistry, Playbook® teaches the alphabets first — thirty elements and twenty-five radicals as punch-out tokens — then formulas, then balanced equations, in that order and with a score gate at each step. It is the order the tables above are set in and the order the textbooks explain last.

Request a sample copy for your school How the method works

The other boards

  • ICSE — Classes 6 to 9 · A student writes symbols in Class 6 and balances equations in Class 8, three years and one year respectively before Class 9 explains valency and how a formula is put together.
  • SSLC — Classes 8 to 10 · The order is inverted. Balancing an equation is explained in Class 8, before either a chemical formula or a chemical equation has been explained.