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Chemistry CBSE Live product
Class 10 (2026-27)
Chemical reactions and equations
Combination and decomposition reaction
5.
Categories of chemical reactions
Question:
3
m.
Read the following question and answer:
Define photolytic decompostion reaction and provide two examples.
A reaction in which
two or more simple substances combine to form a single compound
single compound breaks down into simpler substances by absorption of light
single compound breaks down into two or more simpler substances when heated
one element replaces another element in a compound
is known as
photolytic decomposition
reaction.
Examples:
\(2AgCl → 2Ag + Cl_2\)
\(CaCO_3 → CaO + CO_2\)
\(2H_2O → 2H_2 + O_2\)
\(HCl + NaOH → NaCl + H_2O\)
and
\(2AgBr → 2Ag + Br_2\)
\(KBr → 2K + Br_2\)
\(Zn + CuSO_4 → ZnSO_4 + Cu\)
\(2Na + Cl_2 → 2NaCl\)
.
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