100 examples of balanced chemical equations with answers

Balancing Chemical Equations is one of the most important topics in Chemistry for Class 9,10,11,12 of CBSE, RBSE and NIOS board examinations. Students often struggle with balancing reactions using the Hit and Trial method. In this post, you will find 100 examples of balanced chemical equations with answers arranged from easy to difficult level for practice and exam preparation.

Earlier this post had 50 examples, now the post has been updated with 100 examples as per student’s demand so now you will find 100 examples of balanced chemical equations with answers for practice and exam preparation.

 These examples include decomposition, displacement, combination and neutralization and redox reactions to help you master the concept easily. There are different methods of balancing a chemical equation. We have already discussed hit and trial method. Today we will go through some examples of balanced chemical equations with answers.

Examples of Balanced Chemical Equations (1-50)

1.CH4 +O2 → CO2 + H2O

  Ans- CH4 +O2 →  CO2 + 2H2O

2.Na+ H2O → NaOH + H2

Ans- 2Na+ 2H2O → 2NaOH + H2

3.Fe2O3 + HCl → FeCl2 + H2O

Ans- Fe2O3 + 6HCl → 2FeCl2 +3 H2O

4.C2H6+ O2 → CO2 + H2O

Ans- 2C2H6+ 7O2 → 4CO2 + 6H2O

5.Fe+ O2 →Fe2O3

Ans- 4Fe+ 3O2 →2Fe2O3

6.KClO3 →KCl + O2

Ans- 2KClO3 →2KCl + 3O2

7.Fe + H2O →Fe3O4 + H2

Ans- 3Fe + 4H2O →Fe3O4 + 4H2

8.KMnO4 +HCl →KCl + MnCl2+ H2O+ Cl2

Ans- 2KMnO4 +16 HCl →2KCl + 2MnCl2+ 8H2O+ 5Cl2

9.KOH+ H2SO4 →K2SO4 + H2O

Ans- 2KOH+ H2SO4 →K2SO4 + 2H2O

10.Al(OH)3+ H2SO4 →Al2(SO4)3+ H2O

Ans- 2Al(OH)3+ 3H2SO4 →Al2(SO4)3+ 6H2O

11.KNO3 →KNO2 + O2

Ans- 2KNO3 →2KNO2 + O2

12.Al + O2→ Al2O3

Ans- 4Al + 3O2→ 2Al2O3

13.HNO3+Ca(OH)2 →Ca(NO3)2+ H2O

Ans- 2HNO3+Ca(OH)2 →Ca(NO3)2+ 2H2O

14.NaOH+ H2SO4 →Na2SO4+ H2O

Ans- 2NaOH+ H2SO4 →Na2SO4+ 2H2O

15.NaCl+ AgNO3→AgCl + NaNO3

Ans- NaCl+ AgNO3→AgCl + NaNO3

16.BaCl2+ H2SO4 →BaSO4 + HCl

Ans- BaCl2+ H2SO4 →BaSO4 + 2HCl

17.Ca(OH)2+CO2 →CaCO3+ H2O

Ans- Ca(OH)2+CO2 →CaCO3+ H2O

18.Zn+ AgNO3 →Zn(NO3)2 + Ag

Ans- Zn+ 2AgNO3 →Zn(NO3)2 + 2Ag

19.Al+CuCl2 →AlCl3+ Cu

Ans- 2Al+3CuCl2 →2AlCl3+ 3Cu

20.BaCl2 +K2SO4→BaSO4+KCl

Ans- BaCl2 +K2SO4→BaSO4+2KCl

21.KBr + BaI2→ KI + BaBr2

Ans- 2KBr  + BaI2 →2KI + BaBr2

21.ZnCO3 →ZnO +CO2

Ans- ZnCO3 →ZnO +CO2

22.H2+ Cl2 →HCl

Ans- H2+ Cl2 →2HCl

23.Mg +HCl →MgCl2+ H2

Ans- Mg +2HCl →MgCl2+ H2

24.AgBr →Ag+ Br2

Ans- 2AgBr →2Ag+ Br2

25.AgCl →Ag + Cl2

Ans- 2AgCl →2Ag + Cl2

26.Pb(NO3)2→PbO +NO2+O2

Ans- 2Pb(NO3)2→2PbO +4NO2+O2

27.FeSO4 → Fe2O3 +SO2 + SO3

Ans- 2FeSO4 → Fe2O3 +SO2 + SO3

28.H2S + Cl2→S + HCl

Ans- H2S + Cl2→S + 2HCl

29.Ba(OH)2 + HBr →BaBr2 + H2O

Ans-Ba(OH)2 + 2HBr →BaBr2 + 2H2O

30.KCN+ H2SO4 →K2SO4 + HCN

Ans- 2KCN+ H2SO4 →K2SO4 + 2HCN

31.Al + HCl →AlCl3 + H2

Ans- 2Al + 6HCl →2AlCl3 + 3H2

32.HgCl2 + SnCl2 → Hg2Cl2 + SnCl4

Ans- HgCl2 + SnCl2 → Hg2Cl2 + SnCl4

33.PbO2 + H2SO4 →PbSO4+ H2O+O2

Ans- 2PbO2 + 2H2SO4 →2PbSO4+ 2H2O+O2

34.Al + Fe2O3→Al2O3 + Fe

Ans- 2Al + Fe2O3→Al2O3 + 2Fe

35.N2 + 3H2 →NH3

Ans- N2 + 3H2 →2NH3

36.NH3+ HCl →NH4Cl

Ans- NH3+ HCl →NH4Cl

37.H2O →H2 + O2

Ans- 2H2O →2H2 + O2

38.NH4Cl →NH3 + HCl

Ans- NH4Cl →NH3 + HCl

39.NH3+ H2O →NH4OH

Ans- NH3+ H2O →NH4OH

40.Zn +H2SO4 →ZnSO4 +H2

Ans- Zn +H2SO4 →ZnSO4 +H2

41.BaCl2 + ZnSO4 →ZnCl2 + BaSO4

Ans- BaCl2 + ZnSO4 →ZnCl2 + BaSO4

42.NH3 + H2SO4 →(NH3)2SO4

Ans- 2NH3 + H2SO4 →(NH3)2SO4

43.CuO + H2 →Cu + H2O

Ans- CuO + H2 →Cu + H2O

44.NH4NO2 →H2O + N2

Ans- NH4NO2 →2H2O + N2

45.NaBr + Cl2 →NaCl + Br2

Ans- 2NaBr + Cl2 →2NaCl + Br2

46.MgO + C →CO2 + Mg

Ans- 2MgO + C → 2Mg + CO2 

47.CaCO3 + HCl →CaCl2 + H2O +CO2

Ans- CaCO3 + 2HCl →CaCl2 + H2O +CO2

48.Al2O3 + H2SO4 →Al2(SO4)3 + H2O

Ans- Al2O3 + 3H2SO4 →Al2(SO4)3 + 3H2O

49.Al2(SO4)3+ NaOH →Al(OH)3 + Na2SO4

Ans- Al2(SO4)3+ 6NaOH →2Al(OH)3 + 3Na2SO4

50. C+ O2 →CO2

Ans – C+ O2 →CO2

 

More Balanced Chemical Equations (51 - 100)

 

51. N₂ +O₂ →NO

Ans- N₂ +O₂ →2NO

52.NO +O₂ →NO₂

Ans - 2NO +O₂ →2NO₂

53. SO₂ +O₂ →SO₃

Ans- 2SO₂ +O₂ →2SO₃

54. P + O₂ →P₂O₅

Ans- 4P + 5O₂ → 2P₂O₅

55. C+ H₂ →CH₄

Ans- C+ 2H₂ →CH₄

56. CO + O₂ → CO₂

Ans- 2CO + O₂ → 2CO₂

57. Na+ Cl₂ →NaCl

Ans- 2Na+ Cl₂ →2NaCl

58. K + Cl₂→KCl

Ans- 2K + Cl₂→2KCl

59. Ca + O₂ → CaO

Ans- 2Ca + O₂ → 2CaO

60. Mg + N₂ →Mg₃N₂

Ans- 3Mg + N₂ →Mg₃N₂

61. H₂O₂ →H₂O + O₂

Ans- 2H₂O₂ →2 H₂O + O₂

62. Na₂O +H₂O →NaOH

Ans- Na₂O +H₂O →2NaOH

63. CaO + H₂O →Ca(OH)₂

Ans- CaO + H₂O →Ca(OH)₂

64. CO₂ + H₂O →H₂CO₃

Ans- CO₂ + H₂O →H₂CO₃

65. NH₃ + O₂ →NO + H₂O

Ans- 4NH₃ + 5O₂ → 4NO + 6H₂O

66. Na₂CO₃ + HCl → NaCl +H₂O + CO₂

Ans- Na₂CO₃ + 2HCl → 2NaCl +H₂O + CO₂

67. K₂CO₃ + HCl → KCl + H₂O + CO₂

Ans- K₂CO₃ + 2HCl → 2KCl + H₂O + CO₂

68. CaCO₃ → CaO + CO₂

Ans- CaCO₃ → CaO + CO₂

69. NH₄NO₃ → N₂O + H₂O

Ans- NH₄NO₃ → N₂O + 2H₂O

70. NaHCO₃  → Na₂CO₃ + H₂O + CO₂

Ans- 2NaHCO₃  → Na₂CO₃ + H₂O + CO₂

71. Cu + AgNO₃ →Cu(NO₃)₂ + Ag

Ans- Cu + 2AgNO₃ →Cu(NO₃)₂ + 2Ag

72. Fe + CuSO₄ →FeSO₄ + Cu

Ans- Fe + CuSO₄ →FeSO₄ + Cu

73. Zn + CuCl₂ → ZnCl₂ +Cu

Ans- Zn + CuCl₂ → ZnCl₂ +Cu

74. Pb +AgNO₃ →Pb(NO₃)₂  +Ag

Ans- Pb + 2 AgNO₃ → Pb(NO₃)₂  + 2Ag

75. Al + FeCl₃ → AlCl₃ +Fe

Ans- Al + FeCl₃ → AlCl₃ +Fe

76.Na₂SO₄ + BaCl₂ →BaSO₄  + NaCl

Ans- Na₂SO₄ + BaCl₂ →BaSO₄  + 2NaCl

77. KCl + AgNO₃ →AgCl + KNO₃

Ans- KCl + AgNO₃ →AgCl + KNO₃

78. CaCl₂ + Na₂CO₃ → CaCO₃ + NaCl

Ans- CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

79. Pb(NO₃)₂ + KI → PbI₂ + KNO₃

Ans- Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃

80. FeCl₃ +NaOH → Fe(OH)₃ +NaCl

Ans- FeCl₃ +3NaOH → Fe(OH)₃ + 3NaCl

81. AlCl₃ +NaOH →Al(OH)₃ + NaCl

Ans- AlCl₃ + 3NaOH →Al(OH)₃ + 3NaCl

82.  CuSO₄ + NaOH → Cu(OH)₂ + Na₂SO₄

Ans- CuSO₄ + 2NaOH → Cu(OH)₂ + Na₂SO₄

83. H₃PO₄ + NaOH → Na₃PO₄ + H₂O

Ans- H₃PO₄ + 3NaOH → Na₃PO₄ + 3H₂O

84. H₂CO₃ → H₂O + CO₂

Ans- H₂CO₃ → H₂O + CO₂

85. (NH₄)₂Cr₂O₇ → Cr₂O₃ +N₂ + H₂O

 Ans - (NH₄)₂Cr₂O₇ → Cr₂O₃ +N₂ + 4H₂O

86. C₂H₂ + O₂ → CO₂ +H₂O

Ans- 2 C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

87.  C₃H₈ + O₂ → CO₂ +H₂O

Ans- C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

88. C₄H₁₀ + O₂ → CO₂ + H₂O

Ans-  2C₄H₁₀ + 13 O₂ → 8CO₂ + 10 H₂O

89.  C₂H₄ + O₂ → CO₂ +H₂O

Ans- C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

90.  C₆H₆ +O₂ → CO₂ + H₂O

Ans- 2C₆H₆ + 15 O₂ → 12 CO₂ + 6H₂O

91. Si + O₂ → SiO₂

Ans- Si + O₂  → SiO₂

92. Fe + S → FeS

Ans- Fe + S → FeS

93.  Na + O₂ → Na₂O

Ans- 4Na + O₂ → 2Na₂O

94.  K + O₂ → K₂O

Ans- 4K + O₂ → 2K₂O

95. Ca + Cl₂ → CaCl₂

Ans- Ca + Cl₂ → CaCl₂

96. H₂ + S  → H₂S

Ans- H₂ + S  → H₂S

97. PCl₅ +H₂O → H₃PO₄ + HCl

Ans- PCl₅ + 4H₂O → H₃PO₄ + 5HCl

98. SO₃ + H₂O → H₂SO₄

Ans- SO₃ + H₂O → H₂SO₄

99. N₂O₅ + H₂O → HNO₃

Ans- N₂O₅ + H₂O → 2HNO₃

100. Cl₂ +H₂O → HCl + HClO

Ans- Cl₂ +H₂O → HCl + HClO

So, learn these examples of balanced chemical equations for your board exams. You can also learn Hit and Trail method to balance the chemical equations.

Practice Questions (Try Yourself)

Balance these equations

    1. P + O₂ →P₂O₅

    2. Cu + HNO₃ →Cu(NO₃)₂ + NO₂  + H₂O

    3. Na + O₂ →Na₂O

    4. Fe + Cl₂ →FeCl₃

    5. C₂H₄ + O₂ →CO₂ + H₂O 

Frequently Asked Questions

Q1. Why is balancing chemical equation important?

Answer – A chemical equations is balanced because of the law of conservation of mass.

Q2. Which method is easiest to balance equations?

Answer- Hit and trial method is the easiest method to balance equations.

Q3. Which class studies balancing equations?

Answer- Class 9 ,10,11,12 of RBSE , CBSE and NIOS board 

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