CBSE 2025 · Region 1 · Set 2 · Q26 · 2 marks
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
Chemical Reactions and EquationsWriting and Balancing Chemical EquationsApplyvery_short_answereasy
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.