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Which of the following statement(s) is/are true? A. An unbalanced chemical equation assumes the same number of atoms of different elements in the reactants and products. B. A balanced chemical equation assumes an unequal number of atoms of one or more elements in the reactants and products.

Which of the following statement(s) is/are true? A. An unbalanced chemical equation assumes the same number of atoms of different elements in the reactants and products. B. A balanced chemical equation assumes an unequal number of atoms of one or more elements in the reactants and products. Correct Answer Both A and B are false

The correct answer is Both A and B are false.

Key Points

  • A balanced chemical equation has an equal number of atoms of different elements on the side of reactants and products.
    • Hence statement B is false.
  • An unbalanced chemical equation has an unequal number of atoms of one or more elements in the reaction. 
    • Hence statement A is false.
  • A balanced chemical equation is written by balancing the total number of atoms of each element in reactants and products
  • It is more informative than the unbalanced chemical equation.
  • It is based on the law of conservation of mass & Dalton’s atomic theory.
  • If the number of atoms of each element in reactants is not equal to the number of atoms of each element present in a product, then the chemical equation is called the unbalanced chemical equation.

Additional Information

Balanced chemical equation Unbalanced chemical equation
Balanced chemical equations possess the same number of atoms of distinct elements in reactants as well as products. Unbalanced chemical equations possess different numbers of atoms of distinct elements in reactants as well as products.
Balanced chemical equations possess the same masses of different elements in reactants and products. Unbalanced chemical equations possess different masses of distinct elements in reactants and products.

Example:

N2+3H2→2NH3

Example:

N2+H2→2NH3

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