CBSE Class 10 Science 2021 Term 1 Solved Paper

© examsnet.com
Question : 10
Total: 60
It is important to balance the chemical equations to satisfy the law of conservation of mass. Which of the following statements of the law is incorrect?
Solution:  
The 'Law of Conservation of Mass' states that:
1. Mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
2. The total mass of the elements present in reactants in a chemical reaction is equal to the total mass of the elements present in product.
3. The number of atoms of each element remains the same, before and after a chemical reaction.
Thus, the statement which is incorrect is given in option (c), "the chemical composition of the reactants is the same before and after the reaction."
© examsnet.com
Go to Question: