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What do you mean by biodegradation ?...

What do you mean by biodegradation ?

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CHHAYA PUBLICATION-PREVIOUS YEAR QUESTION PAPER 2019-WBCHSE 2019 (SECTION II )
  1. Why the compound CH(3) CN can act both as nucleophile and electrophile...

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  2. Which one is more acidic between acetic acid and monochloroacetic and ...

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  3. What do you mean by biodegradation ?

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  4. How do detergents pollute water ?

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  5. Establish the mathematical expression of de Broglie wavelength about d...

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  6. What is the number of nodes in 3d orbitals ?

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  7. Prove with help of postulate of Bohr's theory that the velocity of an ...

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  8. What is number of unpaired electrons in V^(3+) ion ?

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  9. What is the cause of Lanthanide contraction.

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  10. Why is Cu a transition element but Zn is not although both of them are...

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  11. Why does He(2) molecule never form ?

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  12. Why does ice float on water ?

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  13. Which one hag greater bond angle between Cl(2) O and F(2)O and why ?

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  14. Why difference in dipole moment is found in cis-and trans- isomers of ...

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  15. Find out the ratio of rate of diffusion of H(2) and SO(2) . (S = 32)

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  16. Write down the van der Waals' equation for n moles of real gas .

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  17. For a reaction at constant temperature derive the relation between hea...

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  18. At STP if latent heat of fusion of ice is 6 kJ * mol^(-1) , then find ...

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  19. Discuss the conditions for spontaneity of a process .

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  20. Show by an example that the ratio of two extensive property is always ...

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