Question

10. 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.​

Answer 1

Answer:

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 test tube

C + O2 --------- CO2

Answer 2

Answer:

(a) Saloni should add some water in the test tube in which gas was collected. Shake the test tube and then bring a litmus paper near the test tube.The solution will turn litmus paper red. This shows that the gas is acidic.

(b)Charcoal contains carbon which on burning forms carbon dioxide gas.

C + O² → CO²

The gas evolved is collected in a test tube and water is added to it.

CO² + H²O → H²CO³