Chemical Reactions and Equations — Science STD 10 — Question
CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations2 Marks
Question
Giving examples, state the difference between balanced and unbalanced chemical equations.
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Answer
A balanced chemical equation has an equal number of atoms of different elements in the reactants and products. It has equal masses of various elements in the reactants and products. Example: $\text{Zn}\ +\ \text{H}_2\text{SO}_4\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{ZnSO}_4\ +\ \text{H}_2$
An unbalanced chemical equation has an unequal number of atoms of one or more elements in the reactants and products. It has unequal masses of various elements in the reactants and products. Example: $\text{H}_2\ +\ \text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{2H}_2\text{O}$
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