Question

A water insoluble substance X on reacting with dilute sulphuric acid released the colourless and odourless gas accompanied by bricks effervescence. when gas was passed water , solution obtained turned blue disappaered when the gas was passed in excess . identify the substance X and write the chemical equation of the reactions involved

Answer 1

Hii here is your answer

The chemical equation for this reaction is 
CaCO3 + H2SO4 → CaSO4 + H2O + CO2

hope it will help you