Consider this reaction: caco3(s) cao(s) + co2(g). what could be done to increase the rate of decomposition of caco3?
add co2
remove co2
decrease the pressure
decrease the temperature
increase the temperature

Remove CO2

Explanation:

As per Le Chatelier's principle, when a system at equilibrium is subjected to changes in temperature, pressure, concentration etc then the equilibrium will shift in a direction to undo the effect of the induced change.

The given reaction is:

CaCO3 (s) ↔ CaO(s) + CO2(g)

Therefore, if CO2 is removed then the equilibrium will shift to the right towards the products thereby increasing the rate of decomposition of CaCO3.