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In Claisen condensation , two molecules ...

In Claisen condensation , two molecules of ester get condensed in the presence of a strong base to give :

A

Acid anhydride

B

`beta` Keto ester

C

Amides

D

Acids.

Text Solution

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The correct Answer is:
B
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MODERN PUBLICATION-ALDEHYDES , KETONES AND CARBOXYLIC ACIDS-Level -II (Multiple Choice Questions )
  1. The correct order of reactivity is :

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  2. Reduction of lactic acid with excess of HI gives :

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  3. In Claisen condensation , two molecules of ester get condensed in the ...

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  4. Which of the following acids in most reactive towards esterification w...

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  5. When acetic acid reacts with calcium , a gas is evolved . The gas is :

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  6. The number of isomeric carboxylic acids posible for C(4)H(9)COOH are ...

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  7. In the reaction sequence , C(2)H(5)OHoverset(PBr(3))toAoverset(KCN)toB...

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  8. The strongest acid among the following is :

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  9. The correct order of decreasing acidity of the following is : (I) ...

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  10. In the reaction , n- Hexanenitrile underset(H(2)O)overset(H(3)O^(+))to...

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  11. overset("Heat")toAoverset(NH(3))toBoverset(NaOH)toCunderset(KOH)overse...

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  12. Methyl group attached to benzene can be oxidised to carboxyl group by ...

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  13. Oxidation of toluene with CrO(3) in the presence of (CH(3)CO)(2)O give...

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  14. Grignard reagent and ethyl acetate react to give :

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  15. Which aromatic acid among the following is weaker than simple benzoic ...

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  16. Which of the following acids has the smallest dissociation constant ?

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  17. The end product of the reaction , CH(3)underset(O)underset(||)(C)CH(...

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  18. When acetic acid reacts with ketone , the product formed is :

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  19. Which of the following most readily undergoes hydrolysis ?

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  20. Sodium phthalamide overset(Br(2).KOH)toXoverset(H(3)O^(+))toY The pro...

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