✓ Board-verified
Science · 2024 · 2 marks
CBSE 2024 · Region 2 · Set 2 · Q21
Define a decomposition reaction. Write an equation to show thermal decomposition of ferrous sulphate crystals.What is meant by a balanced chemical equation ? Why is it necessary for the equation to be balanced ?
Define a decomposition reaction. Write an equation to show thermal decomposition of ferrous sulphate crystals.
What is meant by a balanced chemical equation ? Why is it necessary for the equation to be balanced ?
Marking-scheme solution
When a single reactant breaks down to give simpler products.
\[2 \mathrm{FeSO}_{4}(\mathrm{~s}) \xrightarrow{\mathrm{Heat}} \mathrm{Fe}_{2} \mathrm{O}_{3}(\mathrm{~s})+\mathrm{SO}_{2}(\mathrm{~g})+\mathrm{SO}_{3}(\mathrm{~g})
\]
Balanced chemical equation is one in which the total number of atoms of each element remains same for reactants and products.
Mass can neither be created nor destroyed in the chemical reaction./ To satisfy law of conservation of mass.
X SCIENCE $\displaystyle 31$/$\displaystyle 2$/$\displaystyle 2$ PAGE $\displaystyle 3$
More from Chemical Reactions and Equations
- Copper powder is taken in a china dish and heated over a burner. Name the product formed and state its…2024 · asked 3×
- Why do we balance a chemical equation? Name and state the law that suggests the balancing of a chemical…2025 · asked 3×
- Which of the following is an example of a displacement reaction?2026 · asked 3×
- Define a double displacement reaction. Write the chemical equation of a double displacement reaction which is…2023 · asked 3×
- The balanced chemical equation showing reaction between quicklime and water is:2023 · asked 3×
- C 6 H 12 O 6(aq)+6 O 2( g) → 6 CO 2( g)+6 H 2 O (l). The above reaction is an example of -2026 · asked 3×
- Which one of the following reactions is different from the remaining three?2024 · asked 3×
- (i) While electrolysing water before passing the current some drops of an acid are added. Why? Name the gases…2023 · asked 3×
CBSE Class 10 Science past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.