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What are freons ? What are their harmful...

What are freons ? What are their harmful effects on the environment ?

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MODERN PUBLICATION-SAMPLE PAPER 2019-Exercise
  1. The rate constants ofa reaction at 500 K and 700 K are 0.025 sec^-1 an...

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  2. Answer the following What do you mean by biodegradale and non-biodeg...

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  3. Answer any seven questions of the following: What are bidentate liga...

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  4. Answer any seven questions of the following: CuSO4 solution is elect...

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  5. What are antioxidants ? Give two examples.

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  6. How does Schottky defect arise ? In which type of ionic compounds does...

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  7. Answer the following: Match the diseases of Group (A) with the vitam...

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  8. The osmotic pressure ofa solution containing 50 g of a solute in one l...

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  9. What are freons ? What are their harmful effects on the environment ?

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  10. What happens when KI solution is added to acidified K2Cr2O7 solution?

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  11. Answer any seven questions of the following: Under which condition ...

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  12. What happens when yellow phosphorus is heated with dilute NaOH solutio...

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  13. Starting from nitrobenzene how will you prepare benzene diazonium chlo...

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  14. What are enzyme catalysts ? Give a reaction involving an enzyme cataly...

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  15. Name four factors affccting adsorption gases by solids.

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  16. What are oil in water and water in oil type of emulsions ? Give one ex...

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  17. Describe the Siemen's method of preparation of Ozone. How does it reac...

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  18. How is acetic acid prepared from methyl magnesium bromide ?

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  19. State Raoult's law. How is the molecular mass of a solute determined f...

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  20. A solution contains 72% water d 28% methyl alcohol. Calculate the mole...

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