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Explain why it is very difficult to intr...

Explain why it is very difficult to introduce the third `-NO_2` group into the benzene ring.

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CHHAYA PUBLICATION-HYDROCARBONS-(QUESTION-ANSWER ZONE FOR BOARD EXAMINATION (Short answer type)
  1. Prove that benzene is insoluble in water and is lighter than water.

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  2. Why does benzene burn with a sooty flame ?

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  3. Explain why it is very difficult to introduce the third -NO2 group in...

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  4. Nitration of aniline with 98% H2SO4 and conc. HNO3 occurs very slow...

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  5. Explain why nitrobenzene (C6H5-NO2) is used as a solvent in the Friede...

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  6. Are all the six carbon -carbon bonds of benzene molecule equal in leng...

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  7. Heats of hydrogenation of benzene and cyclohexane are -49.8 and -28.6 ...

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  8. Activating groups are ortho-/para-directing ,while the deactivating gr...

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  9. How will you remove traces of aniline present in benzene ?

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  10. How can traces of phenol present in a sample of benzene be removed ?

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  11. Why groups like -CHO,-NO2,-B(OR)3,-overset(oplus)PBr3 and -overset(opl...

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  12. Arrange the compounds in increasing order of their rate of nitration a...

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  13. How will you distinguish between benzene and hexane by a simple test i...

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  14. Aniline does not undergo Friedel-Crafts reaction, though it contains a...

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  15. A mixture of benzene and bromine solution remains unchanged for indefi...

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  16. How many trisubstituted benzene may be obtained from o-,m-and p-chloro...

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  17. 1 C5H(12) and 2 C8 H(18) are two alkanes which form one monochloride e...

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  18. How can you convert methyl acetylene to acetone ?

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  19. Write the monosubstituted compounds formed in each of the following r...

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  20. Write the monosubstituted compounds formed in each of the following r...

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