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…...............gas is fomed by the comb...

…...............gas is fomed by the combination of oxygen and nitrogen at the time of lightning.

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  1. The element is essential for the growth of plants. a) Suggest any tw...

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  2. a) It is said that lightning is a blessing for plants. What could be t...

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  3. Find the gases for which the following statements are related: a) Bur...

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  4. Given below are certain uses of chlorine, oxygen, nitrogen and hydroge...

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  5. Classify the following reactions into combination,displacement,decom...

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  6. Excess use of C.F.C causes depletion of ozone layer. a) What is C.F....

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  7. Find the relation and fill in the blanks: Combustion gas: Hydrogen C...

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  8. Which element found more in stratosphere.

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  9. …...............gas is fomed by the combination of oxygen and nitrogen...

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  10. The main compound of hydrogen is …..................

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  11. Which substance is used for purifying drinking water in ponds and wel...

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  12. Write two examples for double decomposition reaction.

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  13. "Hydrogen as the fuel of the future" this is the heading of once scien...

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  14. Zinc reacts with dilute hydrochloric acid to produce hydrogen gas. a...

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  15. Hydrogen is a fuel to no enevirnmental pollution. a) Which are the p...

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  16. Some potassium permaganate taken in a test tube and heat it. Insert a ...

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  17. Take 5mL of diltute hydrochloric acid ina test tube and add zinc granu...

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  18. A graphic showing the calorific value of fuels is given below: a) Wh...

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  19. Some chemicals available are given below. (NaCl, conc. HCl, KMnO4, K...

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  20. Oxygen is essential for life on earth. a) How is oxygen prepared in ...

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