Question

Which of the following is an example of a thermal decomposition reaction?

• A. 2H2O→ 2H2+O2
• B. 2NaCl (molten)→ 2Na + Cl2
• C. ZnCO3→ ZnO + CO2
• D. 2AgCl 2Ag + Cl2

Answer 1

Answer:

C. ZnCO3→ ZnO + CO2

• Thermal decomposition is a type of chemical reaction where a single substance decomposes into two or more simpler substances when heated. Among the given options, only ZnCO3→ZnO + CO2 fitsthis description.

• Zinc carbonate (ZnCO3) decomposes into zinc oxide (ZnO) and carbon dioxide(CO2) upon heating.