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Chemistry CBSE Live product
Class 10
Chemical reaction and equations
Annual Revision I - Chemical reactions and equations
5.
Categories of chemical reactions
Question:
3
m.
Answer the given question:
Define thermal 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 two or more simpler substances when heated
single compound breaks down into two or more simpler substances by absorption of light
one element replaces another element in a compound
is known as
thermal decomposition
reaction.
Examples:
\(2Na + Cl_2 → NaCl\)
\(Zn + CuSO_4 → ZnSO_4 + Cu\)
\(2H_2O → 2H_2 + O_2\)
\(CaCO_3 → CaO + CO_2\)
and
\(Fe(SO_4) → Fe_2O_3 + SO_2 + SO_3\)
\(Na_2SO_4 + BaCl_2 → BaSO_4 + 2NaCl\)
\(HCl + NaOH → NaCl + H_2O\)
\(N_2 + 3H_2 → 2NH_3\)
.
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