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How are carboxylic acids prepared form G...

How are carboxylic acids prepared form Grignard regents ?

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Grignard reagents react with solid carbon dioxide (dry ice) to form salt of carboxylic acids, which on acidification gives carboxylic acid.
`R-MgX+O=C overset("Dry ethe")to R-OCOMgX overset(H_(3)O^(+))to RCOOH`
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Grignard reagent is usually prepared by R-X+Mg overset(Et_(2)O)rarr RMgX " Grignard reagent" Ar-X+Mg overset(Et_(2)O)rarr ArMgX " Grignard reagent" Grignard reagent acts as a strong base. Grignard reagent carry out nucleophilic attack in absence of acidic hydrogen. Grignard reagent form complex with its ether solvent. Complex formation with molecular of ether is an important factor in the formation and stability of Grignard reagent. Which of the following will undergo acid-base reaction with Grignard reagent ?

SUBHASH PUBLICATION-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-QUESTIONS
  1. Formaldehyde undergoes Cannizzaro's reaction. Give reason.

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  2. Given two uses of formaldehyde.

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  3. How are carboxylic acids prepared form Grignard regents ?

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  4. What are Y and Z in the following reactions ?

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  5. Complete the following reaction.

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  6. Complete the following reaction.

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  7. How are carboxylic acids prepared from nitriles ?

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  8. Carboxylic acids are more acidic than phenols. Give reason.

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  9. Explain the effect of electron withdrawing groups. [EWG] on the acidi...

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  10. What is the effect of electron withdrawing group on the acidity of car...

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  11. Explain the effect of electron donating group (EDG) on the acidity of ...

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  12. Among formic acid and acetic acid, which is more acidic ? Give reason...

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  13. How PCl(3), PCl(5) and SOCl(2) reacts with carboxylic acids ?

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  14. Write the chemical equation to convert ethanoic acid to ethanoic anhyd...

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  15. The equation for The reaction between carboxylic acdis and PCl(5)

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  16. Give the equation for The reaction between formaldehyde and con. K...

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  17. Give the equation for The formation of oxime from carbonyl compound...

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  18. A carboxylic acid is heate with alcohol in presence of con. H(2)SO(4)....

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  19. Complete the equation.

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  20. How carboxylic acids react with ammonia ?

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