Check sibling questions

Classify the following into elements, compounds and mixtures.

(a) Sodium

(b) Soil

(c) Sugar solution

(d) Silver

(e) Calcium carbonate

(f) Tin

(g) Silicon

(h) Coal

(i) Air

(j) Soap

(k) Methane

(l) Carbon dioxide

(m) Blood



  • Element- These are basic forms of matter which cannot be broken down into simpler substances by chemical reactions.
  • Compound- These are substances which are made up of 2 or more elements. They are chemically combined together in a fixed proportion.  
  • Mixture- They are formed by mixing of 2 or more substances (these may be elements or compounds). They have a variable composition.


Let's look at each of them now

  1. Sodium - Element
  2. Soil - Mixture 
  3. Sugar solution - Mixture 
  4. Silver - Element
  5. Calcium carbonate - Compound 
  6. Tin - Element 
  7. Silicon - Element 
  8. Coal - Element
  9. Air - Mixture 
  10. Soap - Mixture 
  11. Methane - Compound  
  12. Carbon dioxide - Compound 
  13. Blood - Mixture 

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo