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Science · 2024 · 2 marks
CBSE 2024 · Region 3 · Set 3 · Q21
(a) Write the essential conditions for following reaction to take place and name its types: 2 AgCl → 2 Ag + Cl_2 (b) Complete the following chemical…
(a)
Write the essential conditions for following reaction to take place and name its types : \[2 \mathrm{AgCl} \longrightarrow 2 \mathrm{Ag}+\mathrm{Cl}_{2} \]
(b)
Complete the following chemical reaction in the form of a balanced equation : \[\mathrm{FeSO}_{4} \xrightarrow{\Delta} \mathrm{Fe}_{2} \mathrm{O}_{3}+\ldots \ldots+\ldots \ldots . \]
Marking-scheme solution
(a)
Presence of Sunlight Decomposition reaction / Photochemical reaction.
(b)
\(\displaystyle 2 \mathrm{FeSO}_{4(\mathrm{~s})} \xrightarrow{\text { Heat }} \mathrm{Fe}_{2} \mathrm{O}_{3(\mathrm{~s})}+\mathrm{SO}_{2(\mathrm{~g})}+\mathrm{SO}_{3(\mathrm{~g})}\)
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.