✓ Board-verified
Science · 2025 · 2 marks
Chemical Reactions and EquationsWriting and Balancing Chemical Equations2 marksApplyvery short answer
CBSE 2025 · Region 1 · Set 2 · Q26
What happens when: (write balanced chemical equation) (a) Lead nitrate is thermally decomposed, (b) Natural gas burns in oxygen (or air)?
What happens when : (write balanced chemical equation)
(a)
Lead nitrate is thermally decomposed,
(b)
Natural gas burns in oxygen (or air) ?
Marking-scheme solution
(a) \(\displaystyle 2 \mathrm{~Pb}\left(\mathrm{NO}_{3}\right)_{2} \xrightarrow{\text { heat }} 2 \mathrm{PbO}+4 \mathrm{NO}_{2}+\mathrm{O}_{2}\)
(b) \(\displaystyle \mathrm{CH}_{4}+2 \mathrm{O}_{2} \longrightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O}+\) Heat + light
All Chemical Reactions and Equations questions2025 question paperNCERT solutions: Chemical Reactions and EquationsPractice Chemical Reactions and Equations →
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 colour. Write the chemical equation for the…2024
- Why do we balance a chemical equation? Name and state the law that suggests the balancing of a chemical equation? Balance the following chemical…2025
- Zn+2 CH_3 COOH →(CH_3 COO)_2 Zn+H_2 The above reaction is a:2024
- Which of the following is not a thermal decomposition reaction?2024
- Example of thermal decomposition reaction are (i) 2 AgCl → 2 Ag+Cl_2 (ii) CaCO_3 → CaO+CO_2 (iii) 2 H_2 O → 2 H_2+O_2 (iv) 2 KClO_3 → 2 KCl+3 O_22025
- Which of the following is an example of a displacement reaction?2026
- Define a double displacement reaction. Write the chemical equation of a double displacement reaction which is also a (i) Neutralization reaction and…2023
- Answer the following questions in the context of electrolysis of water: Why is this reaction/process called a decomposition reaction? Giving reason…2024
CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.