Question

. Write chemical equation for the reactions taking place when
(a) zinc carbonate is calcinated. ZnCO3
(b) cinnabar is heated in air.
(c) manganese dioxide is heated with aluminium powder.​

Answer 1

Answer:

don't know sorry hope you understand

Answer 2

Answer:

  a)     ZnCO3 → ZnO + CO2(

b)  The chemical formula for this ore is HgS.

c)  3MnO2 + 4Al ----> 3Mn + 2Al2O3

Explanation:

a) Answer: CaCO3 → CaO + CO2(g). calcination is the process of heating carbonate ores in limited supply of air

b) When cinnabar is heated, pure mercury is obtained Cinnabar is the sulfide ore of mercury.

c) Aluminium powder is a reducing agent. These displacement reactions are so exothermic that the metals are produced in the molten state.