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Carboxylic acids with five or less carbo...

Carboxylic acids with five or less carbon atoms are water soluble while the higher acids are insoluble in water. Explain.

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The solublit of carboxylic acid in water is due to the polar COOH group which is involved in hydrogen bonding while the non-polar alkyl group being lyophobic in nature tends to oppose it. As the size of the alkyl group increases, the extent of hydrogen bonding with water decreases and so the solublity in water.
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DINESH PUBLICATION-CARBOXYLIC ACIDS -ADDITIONAL IMPORTANT QUESTIONS
  1. Tertiary butyl benzene does not give benzoic acid when oxidised with K...

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  2. Fluorine is more electronegative than chlorine but p-fluorobenzoic aci...

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  3. CH(3)COO^(-) ion is more stable than C(2)H(5)O^(-) ion. Assign reason.

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  4. Peroxyacetic acid is a weaker acid than acetic acid. Explain.

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  5. Why are boiling of aldehydes and ketones lower than those of the corre...

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  6. Which out of each pair is expected to be a stornger acid ? (a) CH(3)...

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  7. What is glacial acetic acid ? Why is it so named ?

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  8. How will you prepare 2-methylbutanoic acid from butan-2-01 ?

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  9. How will you convert propionic acid to acetic acid ?

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  10. How will you prepare butanoic acid from 1-bromopropane?

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  11. Suggest an oxidising agent to convert (CH(3))(2)C=CHCOCH(3)" to "(CH(3...

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  12. Explain Why : (i) Carboxylic acids are stronger acids than alcohols....

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  13. How will you detect the presence of carboxyl group in a compound ?

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  14. Why is CH(2)=CH-COOH a stronger acid than CH(3)CH(2)COOH?

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  15. Out of but-3-enoic acid and but-3-yonic acid, which is a stronger acid...

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  16. Carboxylic acids with five or less carbon atoms are water soluble whil...

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  17. Assign a suitable structure to C(6)H(8)O(2) that can give iodoform tes...

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  18. Arrange the following compounds in the increasing order of their prope...

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  19. From which carboxylic acid and alcohol are the following esters derive...

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  20. Salicylic acid is treated with bromine under two different conditions ...

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