Question

please tell me the reaction

both please​

Answer 1

Answer:

Cao+2Hcl→Cacl2+H2O

MgCl2+NaOH→MgCl2+H2O

CO2+2KOH→K2CO3+H2O

SO3+NaOH→Na2SO4+H2O

for second one I am telling you the missing compound

CO2

NaOH