Which statement best explains the scientific need for a balanced chemical equation?
Answer and explanation
Correct answer: It shows that atoms are not destroyed but are rearranged.
A balanced chemical equation follows the law of conservation of atoms and mass. During a chemical reaction, atoms are not created or destroyed; they are rearranged to form new substances. Equal numbers of each element on both sides show this rearrangement and also give the correct stoichiometric proportions. Therefore A is correct. Colour, the physical state of every product, and heat release are not the scientific reasons for balancing an equation.
Frequently asked questions
What is the correct answer to this question?
It shows that atoms are not destroyed but are rearranged.
Why is this the correct answer?
A balanced chemical equation follows the law of conservation of atoms and mass. During a chemical reaction, atoms are not created or destroyed; they are rearranged to form new substances. Equal numbers of each element on both sides show this rearrangement and also give the correct stoichiometric proportions. Therefore A is correct. Colour, the physical state of every product, and heat release are not the scientific reasons for balancing an equation.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
