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Five most abundant element is the living...

Five most abundant element is the living cell are

A

C,H,O,N,Fe

B

C,H,O,N,P

C

C,H,N,Mg,Ca

D

C,H,Fe,Mg,Ca

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2007-CHEMISTRY
  1. Which of the following aqueous solution has the highest boiling point?

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  2. The X and Y of the reaction scheme C(6)H(5)CHOunderset(C(2)H(5)OH)ov...

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  3. Five most abundant element is the living cell are

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  4. Number of molecules in 7.0 gm of nitrogen gas is

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  5. Correct order of increasing ionic character is

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  6. Which of the following is not paramagnetic ?

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  7. Intense violet colouration was produced on addition of neutral ferric ...

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  8. In the reaction Z+CH(3)MgBroverset("ether")(to)"Intermediate"underse...

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  9. Which of the following contains cobalt?

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  10. The compound that is most reactive towards electrophilic nitration is

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  11. When phenol is treated with CHCl(3) and NaOH, the major product formed...

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  12. Rates of diffusion of H(2),D(2),HD and He gases will be in the order:

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  13. Which of the following will have the highest coagulating power for As(...

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  14. CH(2)CH(2)CH(2)CH(3)overset("catalyst")(to)CH(3)-underset(CH(3))unders...

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  15. C(6)H(5)N(2)^(+)Cloverset(X,Y)(to)C(6)H(5)Cl+N(2) X and Y in the abo...

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  16. In the reaction C(6)H(5)CHO+HCHOoverset(NaOH)(to)X+Y The compounds...

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  17. The polymeric material produced in the condensation reaction between H...

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  18. The half life of a given reaction is doubled as the initial concentrat...

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  19. For a zero order reaction with specific rate constant k(0), linear plo...

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  20. The type of hybridisation in diborane is

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