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Give reason: Aniline gets coloured on s...

Give reason: Aniline gets coloured on standing in air for a long time.

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Knowledge Check

  • Phenol is a colourless liquid but on keeping it in air for long time it converts into brown colour due to

    A
    Air oxidation into p-benzoquinone
    B
    Air oxidation into quinol
    C
    Air oxidation into o-benzoquinone
    D
    Air oxidant into m-benzoquinone
    • CBSE COMPLEMENTARY MATERIAL-PRACTICE PAPER 4-SECTION : C
    1. Give reason: Aniline gets coloured on standing in air for a long time...

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    2. Give reason: Secondary amine is more basic than primary and teritiary...

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    3. Give reason: Aniline is a weaker base than cyclohexylamine.

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    4. When 1.5 g of non-volatile solute was dissolved in 90 g of benzene, th...

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    5. Give reason for the following observations: When silver nitrate solu...

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    6. Give reason why a finely divided substance is more effective as an ads...

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    7. Give reason for the following observations: Lyophilic collooids are...

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    8. Write the product (s) formed when 2-Bromopropane undergoes dehydrohal...

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    9. Write the product (s) formed when Chlorobenzene undergoes nitration r...

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    10. Write the product (s) formed when Methylbromide is treated with KCN

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    11. A reaction is first order in A and of second order in B. Write the dif...

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    12. A reaction is first order in A and second order in B. How is rate affe...

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    13. A reaction is first order in A and second order in B : How is the rate...

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    14. Explain the following: Amino acids behave like salts rather than si...

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    15. Explain the following: The two strands of DNA are complementary to ...

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    16. Explain the following: Reaction of glucose that indicates that the ...

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    17. Name the branched chain component of starch.

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    18. Ribose in RNA and deoxyribose in DNA differ in the structure around wh...

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    19. How many peptide linkages are present in a tripeptide?

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    20. Cr(NH3)4Cl2Br has been isolated in two forms A and B. the form Areacts...

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