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

Complete the synthesis by giving missing starting material, reagent or product. C6H5CHO ->[H2NCONHNH2]

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प्रश्न

Complete the synthesis by giving missing starting material, reagent or product.

\[\ce{C6H5CHO ->[H2NCONHNH2]}\]

रासायनिक समीकरणे/रचना
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उत्तर १

\[\begin{array}{cc}
\phantom{....................................}\ce{O}\\
\phantom{....................................}||\\
\ce{\underset{Benzaldehyde}{C6H5CHO} + \underset{Semicarbazide}{H2NCONHNH2} -> C6H5CH \underset{Benzaldehyde semicarbazide}{= NNHC - NH2} + H2O}\end{array}\]

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उत्तर २

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Aldehydes, Ketones and Carboxylic Acids - Exercises [पृष्ठ २५७]

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 12
पाठ 8 Aldehydes, Ketones and Carboxylic Acids
Exercises | Q 8.17 (iii) | पृष्ठ २५७

संबंधित प्रश्‍न

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

Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Hint: Consider steric effect and electronic effect.


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

Acetal


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

Hemiacetal


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

2, 4-DNP-derivative


How will you bring about the following conversion in not more than two steps?

Bromobenzene to 1-Phenylethanol


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 structure of Phenylmethanamine.


Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A):

(i)  

(ii)  

(iii)  

(iv) 


Which among the following is most reactive to give nucleophilic addition?


Which will undergo faster nucleophilic addition reaction?

Acetaldehyde or Propanone


Write the structure of the product formed when acetone reacts with 2, 4 DNP reagent.


Draw structures of the given derivatives.

The ethylene ketal of hexan-3-one


Draw the structure of the following derivative.

The ethylene ketal of hexane-3-one


Draw structures of the following derivative.

The ethylene ketal of hexan-3-one


Draw structure of the following derivative:

Acetaldehydedimethylacetal


Draw the structure of the following derivative.

Acetaldehydedimethylacetal


Draw structure of the following derivative.

The ethylene ketal of hexan-3-one


Draw structure of the following derivative.

The ethylene ketal of hexan-3-one


Give an example of the reaction in the following case.

Oxime


Give an example of the reaction in the following case.

Imine


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