Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.

(a) How will she find the nature of the gas ?

(b) Write down word equations of all the reactions taking place in this Process



Charcoal is a form of carbon, which is a non-metal.

When non metal react with air, it forms non-metal oxide which is acidic in nature.

Thus, when carbon(charcoal) burns in air, it forms an acidic oxide called carbon dioxide.



The nature of the gas can be found by adding water to the gas in the test tube.

And then put some blue litmus solution in the jar.

The blue litmus solution turns red, this means that the gas is acidic in nature.



Equation 1 : Burning of charcoal

          Carbon + Oxygen → Carbon Dioxide

               C + O 2 → CO 2


Equation 2 : Adding water to the gas to make the solution

        Carbon Dioxide + Water → Carbonic Acid

      CO 2 + H 2 O → H 3 CO 3

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.