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HVZ reaction is specific for -...

HVZ reaction is specific for -

A

Replacement of `beta-`hydrogens

B

Replacement of `alpha-`hydrogens

C

Replaceent of `beta-`carbons

D

Replacement of `alpha-`carbons

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The correct Answer is:
B
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A 1^(st) order reaction has specific rate constant of 2 min ^(-1) The half - life of this reaction will be ______.

Carboxylic acids having at least one alpha -hydrogen react with Cl_(2)" or "Br_(2) in the presnence of red phosphorus to give alpha -halo acids. The reaction is known as H.V.Z. reaction. The HVZ reaction is limited to the formation of alpha -chloro acid and alpha -bromo acid and it is sometimes difficult to carry out the reaction. Answer the following questions : Which of the following carboxylic acids will not give HVZ reaction ?

Carboxylic acids having at least one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorous to give alpha -halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction). R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH The HVZ reaction is limited to the formation of alpha -chloro and alpha -bromo acids and it is sometimes backward 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. Which of the following carboxylic acids will not give HVZ reaction ?

Carboxylic acids having at least one alpha -hydrogen react with Cl_(2) or Br_(2) in the presence of phosphorous to give alpha -halo acids. The reaction is known as Hell -volhar-Zelinsky reaction (HVZ reaction). R-CH_(2)-CO OH overset(P//Br_(2))underset(Delta)toR-CH(Br)CO OH The HVZ reaction is limited to the formation of alpha -chloro and alpha -bromo acids and it is sometimes backward 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. Which of the following will be obtained when acetic acid is subjected to HVZ reaction ?

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)COOHoverset(Br_(2)//Red P)to(A)overset(NaCN)to(B)overset(HOH//H^(+))to(C ) The product (C) will be:

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 :

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. R- CH_(2)-CH_(2)-OHto R-CH_(2) -CH_(2) - COOH In above conversion, the reactant (A) follows the sequence of reactions with three reagents

ALLEN-ALKENE, ALKANE & ALKYNE -EXCERSISE-1
  1. The carboxylic acids react with hydrazoic acid in presence of H(2)SO(4...

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  2. Ethyl acetate underset("Excess")overset(CH(3)MgBr)rarroverset(H(2)O^(+...

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  3. HVZ reaction is specific for -

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  4. Decreasing order of acidity of p-methoxy benzoic acid (A), p-nitrobenz...

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  5. Benzoic acid reacts with Ca(OH)(2). The product obtained on dry distil...

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  6. In a set of the given reactions, acetic acid yields a product C. CH(...

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  7. The correct reactivity order with the nucleophile is :

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  8. CH(3)-CH(2)-underset(O)underset(||)C-NH(2)overset(A)rarrCH(3)-CH(2)-NH...

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  9. Ethyl acetate on treat,emt wotj judrazome goves-

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  10. Among the following, which is the strongest acid?

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  11. In the Rosenmund reduction, the catalyst used is :

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  12. Which of the following carboxylic acids undergoes decarboxylation easi...

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  13. The reactivities of acid halides (I), anhydrides (II),esters(III) and ...

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  14. In the following sequence of reaction CH(3)CH(2)COCloverset(AlCl(3)...

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  15. Consider the following reaction. underset((ii)H^(+),Delta)overset((...

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  16. Which of the following orders regarding the base strength of a leaving...

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  17. The correct decreasing order of their reactivity towards hydrolysis is

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  18. Kolbe's electrolysis of potassium succinate gives CO(2) and ……………………

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  19. In the following reactions. Identify the compounds A, B, C and D PCl(...

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  20. What are A and B in the following sequence of reactions : CH(3)CH(2...

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