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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

What is meant by the following term? Give an example of the reaction in the following case. 2, 4-DNP-derivative - Chemistry

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प्रश्न

What is meant by the following term? Give an example of the reaction in the following case.

2, 4-DNP-derivative

रासायनिक समीकरणे/रचना
एका वाक्यात उत्तर
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उत्तर

When an aldehyde or ketone reacts with 2, 4-dinitrophenylhydrazine in a weak acidic medium, 2, 4-dinitrophenylhydrazone (2, 4-DNP derivative) is produced.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Aldehydes, Ketones and Carboxylic Acids - Exercises [पृष्ठ २५५]

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 12
पाठ 8 Aldehydes, Ketones and Carboxylic Acids
Exercises | Q 8.1 (ix) | पृष्ठ २५५

संबंधित प्रश्‍न

Predict the products of the following reactions:

 


Arrange the following compound in increasing order of its reactivity in nucleophilic addition reactions.

Ethanal, Propanal, Propanone, Butanone.

Hint: Consider steric effect and electronic effect.


Predict the product of the following reaction:


What is meant by the following term? Give an example of the reaction in the following case.

Semicarbazone


Give plausible explanation for the following:

There are two −NH2 groups in semicarbazide. However, only one is involved in the formation of semicarbazones.


Write the main product formed when propanal reacts with the following reagents: 
H2N- NH2  followed by heating with KOH in ethylene glycol.


 Acetone, Acetaldehyde, Benzaldehyde, Acetophenone – reactivity towards addition of HCN. 


How will you convert benzoic acid to m-bromobenzoic acid?


Write a test to differentiate between pentan-2-one and pentan-3-one.


Alkenes   and carbonyl compounds , both contain a π bond but alkenes show electrophilic addition reactions whereas carbonyl compounds show nucleophilic addition reactions. Explain.


Reaction of aqueous sodium hydroxide on chlorobenzene gives which of the following products?


What happens when ethanal is treated with excess ethanol and acid?


The product of the following reaction is

\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{C2H5 - C - CH3 ->[H2/Ni][\Delta] \phantom{..}?}\end{array}\]


Draw the structure of the following derivative.

The ethylene ketal of hexan-3-one


Draw structure of the following derivative:

Acetaldehydedimethylacetal


Draw structure of the following derivative:

Acetaldehydedimethylacetal


Draw structures of the given derivatives.

The ethylene ketal of hexan-3-one


Draw structure of the following derivative.

The ethylene ketal of hexan-3-one


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