Question

The chemical reaction between marble and HCl is given
CaCO3 + HCI ---> CaCl2 +CO2 +H2O
a) Which gas is formed here?
b) How can you identify this gas?
C) Suggest any two methods to increase the rate of reaction​

Answer 1

1. CO2 GAS IS FORMED
2. BY PASSING IT THROUGH LIME WATER IT TURNS MILKY
3. BY ADDING CATALYST AND BY INCREASING THE TEMPERATURE

Answer 2

Answer:

1st carbon dioxide

2nd in chemical reaction

3rd -