Question

2. Which of the following is an example of thermal decomposition? A. CaCO3 [2] CaO + CO2 B. CuO +2H2 Cu + H2O C. Zn + H2CO3 B ZnCO3 + H2 D. H2 + Cl22 2HCI​

Answer 1

Answer:

OPTION A IS THERMAL DECOMPOSITION REACTION BECAUSE CALCIUM CARBONATE IS BROKEN DOWN IN CALCIUM OXIDE AND CO2 GAS.... HOPE THIS HELP YOU

SO OPTION AAAAAA IS CORRECT

Answer 2

C

Zn + H2CO3 gives ZnCo3+H2