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The reaction RCH(2)CH(2)COOHoverset(Red ...

The reaction `RCH_(2)CH_(2)COOHoverset(Red P + Br_2) to R - CH_(2) - CH(Br) -COOH`

A

Reimer- Tiemann reaction

B

Hell-Volhard - Zelinsky reaction

C

Cannizzaro reaction

D

Sandmeyer reaction .

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The correct Answer is:
B
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The reaction RCH_(2)CH_(2)COOHoverset(Red P) to R - CH_(2) - CH -COOH

The reaction RCH_(2)CH_(2)COOHunderset(Br_(2))overset("RedP")to R-CH_(2)-underset(Br)underset(|)(CH)-COOH is called as

Predict the product 'C' in the following chain of the reactions: CH_(3)CH_(2)COOHoverset(Red P//Br_(2))to(A)overset(KCN)to(B)underset(Delta)overset(HOH//H^(+))to(C )

By which of the following sequence of steps can the alcohol RCH_(2)CH_(2)OH(X) be converted into RCH_(2)CH_(2)COOH(Y) ?

Carboxylic acids having atleast one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorus ( or a phosphorus halide) to give alpha -halo acids. This reaction is known as Hell-Volhard-Zelinsky reaction (HVZ reaction), R-CH_(2)COOHunderset(Delta)overset(P//Br_(2))toR-overset(Br)overset(|)"CH"-COOH The HVZ reaction is limited to the formation of alpha -chloro and a-bromo acids and it is sometimes awkward to carry out. The reagents ( X_(2) and P) are noxious and the reaction time is often long and the conditions of reaction are harsh. CH_(3)CH_(2)COOHoverset(Red P +Br_(2))to(A)overset(alc. KOH)(B) . The product (B) is :

CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH This reaction is called

NCERT FINGERTIPS-PRACTICE PAPER -1-Practice Paper 1
  1. Which of the following cannot show linkage isomerism?

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  2. The oxidation of central atom in the complex [ Co(NH(3))(4) CINO(2)] ...

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  3. Which of the following are intermediates in the reaction of excess of ...

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  4. Acetic acid is obtained when

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  5. In alpha -helix , structure, polypepetide chains are folded in a

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  6. The electrode potential is the tendency of metal

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  7. Transition elements exhibit higher enthalpiese of atomization because

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  8. Which of the following is a monomer of natural rubber ?

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  9. The compound which reacts fastest with Lucas reagent at room temperatu...

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  10. Bakelite is obtained from phenol by reaction with

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  11. Which one of the following on oxidation gives a ketone ?

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  12. An ether is more volatile than alcohol having the same molecular formu...

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  13. The reaction RCH(2)CH(2)COOHoverset(Red P + Br2) to R - CH(2) - CH(Br...

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  14. Which of the following is useed for inducing sleep ?

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  15. Identify A in the following sequence of reactions A overset(NH(3)) ...

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  16. IN the reaction, 2NO + CI(2) to 2NOCI it has been found that doublin...

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  17. Which one of the following ions is coloured ?

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  18. which of the following statements about lanthanides is incorrect ?

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  19. Match the column I with column II and mark the appropriate choice.

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  20. Which is a characteristic of a catalyst ?

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