Question

A white powedered solid when added to water produces a hissing sound. Identity the compound. How does this compound react with moist Hcl gas? Write the chemical equation

Answer 1

when quick lime (CaO) reacts with water in produce hissing sound due to liberation of gas and the formation of Ca(OH)2 takes place that is known as slaked lime.

now ,react it with 2HCl +Ca(OH)2-------> Ca(Cl)2 + 2H2O