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Is O2 an element or compound? Why...

Is `O_2` an element or compound? Why

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  • ATOMS AND MOLECULES

    VGS PUBLICATION-BRILLIANT|Exercise OBJECTIVE TYPE QUESTION|1 Videos

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VGS PUBLICATION-BRILLIANT-ATOMS ,MOLECULES AND CHEMICAL REACTIONS-EXERCISE
  1. Why does respiration considered as an exothermic reaction ? Explain.

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  2. Is 'Na' an element or compond? Why

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  3. Is O2 an element or compound? Why

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  4. ''Freshly cut apple turning brown, the iron articles shiny when new, b...

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  5. Take two beakers and prepare lead nitrate aqueous solution and potassi...

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

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

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  8. What is the unit of atomic mass?

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

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  10. Collect the symbols of various elements.

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  11. Give examples to different net charged ions ?

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

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  13. Make a chart showing the concept of mole.

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

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

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

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

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  18. Molecular mass of H2SO4 is

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  19. The formula unit mass of sodium chloride is-

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  20. How can you prevent the spoiling of food?

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