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A light-yellow colour substance (some qu...

A light-yellow colour substance (some quantity) on a watch glass light. It changes into gray colour substance. What is the light-yellow colour substance? What is the gray colour substance?Which type of chemical reaction it is? Write the chemical equation for the reaction

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  • ATOMS AND MOLECULES

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VGS PUBLICATION-BRILLIANT-ATOMS ,MOLECULES AND CHEMICAL REACTIONS-EXERCISE
  1. Take two beakers and prepare lead nitrate aqueous solution and potassi...

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  2. Latha take some quantity of powder of a substance in a test tube. Heat...

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  3. A light-yellow colour substance (some quantity) on a watch glass light...

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  4. What is the unit of atomic mass?

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  5. On the basis of molecular weights of NaOH and H2O, which is heavier?

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  6. Collect the symbols of various elements.

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  7. Give examples to different net charged ions ?

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  8. Prepare formulae for compounds by using Criss- Cross methods.

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  9. Make a chart showing the concept of mole.

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  10. Draw the diagram of arrangement of appartmentus in the activity of he...

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  11. Draw the diagram of “ Electrolysis of water”.

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  12. Draw the diagram of reduction of copper oxide to copper and label it.

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  13. Write any two compounds that are used in your house.

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  14. Molecular mass of H2SO4 is

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  15. The formula unit mass of sodium chloride is-

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  16. How can you prevent the spoiling of food?

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  17. How can you identify the corrosion of metals?

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  18. Where do you observe oxidation process in your daily life ?

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  19. What do you do to prevent rusting of copper and silver articles ?

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  20. What are the effects of oxidation on everyday life?

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