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What is carbon dating ? Explain. In a sa...

What is carbon dating ? Explain. In a sample of wood C-14 activity is 10% of the activity found in fresh wood. Calculate the age of wood sample. `(t_1/2` for C-14 is 5760 years )`

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MODERN PUBLICATION-SAMPLE PAPER 2012-EXERCISE
  1. H2S cannot be dried by passing over conc. H2SO4 because:

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  2. What happens when SnCl2 solution is added to CuCl2 solution ?

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  3. Sodium acetate solution is alkaline. Give reason.

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  4. State KohIrausch’s law.

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  5. How is benzene converted to toluene ?

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  6. What is the action of benzaldehyde with HCN ?

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  7. What happens when ethyl acetate is treated with sodium ethoxide and et...

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  8. Why aniline is less basic than methyl amine?

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  9. What are organometallic compounds? Give two examples.

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  10. What happens when propionic acid is treated with thionyl chloride?

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  11. What is Riemer-Tiemann reaction? Give equation.

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  12. State and explain Faraday's laws of electrolysis. When a current of 24...

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  13. Write short notes on : activation energy

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  14. What is carbon dating ? Explain. In a sample of wood C-14 activity is ...

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  15. Justify the position of boble gases in the periodic table .

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  16. Discuss one method of preparation and the structure of the following...

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  17. How is acetic acid prepared from (i) CH(3)CH(2)OH (ii) CH(3)COOC(2)H(5...

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  18. Write one reaction to distinguish between formic acid and acetic acid....

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  19. What happens when sodium benzoate is heated with soalime ?

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  20. How is benzene diazonium chloride prepared from aniline? How are the f...

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