Home NCERT Solutions NCERT Exemplar CBSE Sample Papers NCERT Books Class 12 Class 10

Chapter 4 Carbon and Its Compound

Carbon is a unique element that forms millions of compounds. The amount of carbon present in the earth's crust and in the atmosphere is quite meagre. The earth's crust has only 0.02%, and 0.03% in the atmosphere as CO2. In Spite of this small amount of carbon available in earth is immense each and every organic compound contains less or more carbon. Existence of carbon all over is due to its versatile property of tetra-valency through which carbon can mutually share its & four valence electrons with other elements to form Covalent bond and secondly self linking property Catenation. This chapter will make you feel interested and curious how varied Carbon compounds are formed, a functional group determines the properties of carbon compounds.

Download pdf of NCERT Solutions for Class Science Chapter 4 Carbon and Its Compound

Download pdf of NCERT Examplar with Solutions for Class Science Chapter 4 Carbon and Its Compound

Exercise 1

Exercise 2

Exercise 3

Exercise 4

  • Q1 How would you distinguish experimentally between an alcohol and a carboxylic acid?
    Ans:

    We can experimentally distinguish between an alcohol and a carboxylic acid by reacting with carbonates and hydrogen carbonates. Acid reacts with carbonate and hydrogen carbonate to evolve CO2 gas that turns lime water milky.

    Metal Carbonate/Metal Hydrogncarbonate + Carboxylic acid
                                                 ↓                    
                              Salt + Water + Carbon dioxide

    Alcohols, on the other hand, do not react with carbonates and hydrogen carbonates.


    Q2 What are oxidising agents?
    Ans:

    Those chemical compounds which have capability of adding oxygen to other reactant substances. Some substances such as alkaline potassium permanganate and acidified potassium dichromate are capable of adding oxygen to others. These are known as oxidising agents.


Exercise 5

Exercise 6