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Sort out non-biodegradable and biodegrad...

Sort out non-biodegradable and biodegradable pollutants among the following : Mercury salts, sewage, plant leaves, BHC, cadmium salts.

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Non-biodegradabel: Mercury salts, BHC, cadmium salts
Biodegradable: sewage, plants leaves
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ICSE-SAMPLE QUESTION PAPER-Question
  1. For an isolated system, DeltaU=0, what will be Delta S?

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  2. Define 'entropy of fusion' and 'entropy of vapourisation and write exp...

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  3. Sort out non-biodegradable and biodegradable pollutants among the foll...

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  4. What do you understand by London smog and how is it formed?

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  5. What is tautomerism ? Give two examples.

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  6. Write the keto and enolic forms of acetone.

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  7. Draw the Lewis structures of the following species : H2 S

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  8. Draw the Lewis structures for the following molecules and ion: CO(3...

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  9. Draw the Lewis structures for the following molecules and ion: HCOOH

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  10. Calculate the oxidation number of the underlined element in the follow...

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  11. Calculate the oxidation number of the underlined element in the follow...

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  12. Calculate the oxidation number of the underlined element in the follow...

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  13. Calculate the oxidation number of the underlined element in the follow...

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  14. Justify giving reactions that among halogens, fluorine is the best oxi...

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  15. Refer to the periodic table given in your book and now answer the foll...

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  16. Refer to the periodic table given in your book and now answer the foll...

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  17. In Ostwald’s process for the manufacture of nitric acid, the first ste...

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  18. What is Wurtz reaction ? Explain with examples. What are its limitatio...

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  19. What happens when acetylene is treated with ozone

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  20. What happens when iodoform is heated with silver powder

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