Past Year - 2 Mark Questions

Class 10
Chapter 4 Class 10 - Carbon and its Compounds

## Give a test that can be used to confirm the presence of carbon in a compound. With a valency of 4, how is carbon able to attain noble gas configuration in its compounds?

If we burn a compound containing carbon in the presence of air, combustion will take place and CO 2 gas will be produced. We can check the presence of CO 2 by passing it through lime water .

If lime water turns milky , that means CO 2 gas has been produced and therefore confirming that the given compound has Carbon in it.

Carbon has a valency of 4 which means it has 4 electrons in the outermost shell. In order to attain noble gas configuration, carbon atoms share these 4 electrons with other atoms to form covalent bonds .

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### Transcript

Give a test that can be used to confirm the presence of carbon in a compound. With a valency of 4, how is carbon able to attain noble gas configuration in its compounds? Answer If we burn a compound containing carbon in the presence of air, combustion will take place and CO2 gas will be produced. We can check the presence of CO2 by passing it through lime water. If lime water turns milky, that means CO2 gas has been produced and therefore confirming that the given compound has Carbon in it. Carbon has a valency of 4 which means it has 4 electrons in the outermost shell. In order to attain noble gas configuration, carbon atoms share these 4 electrons with other atoms to form covalent bonds.