Implications of Balanced Equation MCQs Quiz | Class 10
This quiz for Class X Science (Code 086), Unit I: Chemical Substances – Nature and Behaviour, focuses on the Implications of a Balanced Chemical Equation. It covers the interpretation of reactant/product ratios, mass conservation, and stoichiometric coefficients. Submit your answers to check your score and download the PDF solution.
Understanding Implications of Balanced Chemical Equations
A balanced chemical equation is more than just a symbolic representation of a chemical reaction. It provides quantitative information about the relationship between reactants and products. This quiz tests your understanding of these implications based on Class 10 Science Unit I.
Key Information Conveyed
- Law of Conservation of Mass: The total mass of reactants equals the total mass of products. Atoms are neither created nor destroyed.
- Stoichiometric Ratios: The coefficients (numbers in front of formulas) represent the relative number of moles or molecules required for the reaction.
- Mass Relationships: By using atomic masses, we can calculate the exact mass of reactants needed to produce a specific mass of product.
- Volume Relationships (for Gases): For gaseous reactions, the coefficients also represent the ratio of volumes (at the same temperature and pressure).
Information Not Conveyed
While balanced equations are powerful, they have limitations. They typically do not tell us:
| Feature | Explanation |
|---|---|
| Rate of Reaction | How fast or slow the reaction proceeds. |
| Feasibility | Whether the reaction will actually occur under given conditions. |
Extra Practice Questions
- State the ratio of molecules in the formation of water: 2H2 + O2 -> 2H2O.
- Does a balanced equation indicate the time taken for completion?
- If 28g of Nitrogen reacts with 6g of Hydrogen, what mass of Ammonia is formed?
- What physical state does the symbol (aq) represent?
- Why must we balance chemical equations?
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