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Which of the following are chemical chan...

Which of the following are chemical changes ?
(a) Growth of a plant
(b) Rusting of iron
(c ) Mixing of iron filings and sand
(d) Cooking of food
(e ) Digestion of food
(f) Freezing of water
(g) Burning of a candle

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Chemical changes are : Growth of a plant, Rusting of iron, Cooking of food, Digestion of food, Burning of a candle.
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DINESH PUBLICATION-IS MATTER AROUND US PURE-N.C.E.R.T
  1. what are pure substance ? Give two example of pure substances.

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  2. List the points of differences between homogeneous and heterogenous mi...

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  3. How are sol, solution and suspension different from each other ?

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  4. To make a saturated solution, 36 g of sodium chloride is dissolved in ...

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  5. How will you separate a mixture containing kerosene and petrol (differ...

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  6. Name the technique to separate (i) butter from curd (ii) salt fro...

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  7. What types of mixtures can be separated by technique known as crystall...

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  8. Classify the following as chemical or physical changes : ** cutting ...

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  9. Try to segregate the things around you as pure substances and mixtures...

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  10. Which separation techniques will you apply for the separation of the f...

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  11. Write the steps you would use for making tea. Use the words solution, ...

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  12. Pragya tested the solubility of three different substances at differen...

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  13. Explain the following given examples: {:((a),"saturated solution",(b...

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  14. Classify each of the following as a homogeneous or heterogeneous mixtu...

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  15. How would you confirm that a colourless liquid given to you is pu...

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  16. Which of the following materials fall in the category of a pure substa...

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  17. Identify the solutions among the following mixtures. (a) Soil (b) ...

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  18. Which of the following will show "Tyndall effect "? (a) Salt solutio...

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  19. Classify the following into elements, compounds and mixtures. (a) So...

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  20. Which of the following are chemical changes ? (a) Growth of a plant ...

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