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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

Acetaldehyde, when treated with which among the following reagents does NOT undergo addition reaction?

(A) Ammonia

(B) Hydroxylamine

(C) Ammoniacal silver nitrate

(D) Semicarbazide


How are the following compounds prepared?

benzaldehyde from benzene


Write the products formed when CH3CHO reacts with the following reagents : H2N – OH


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.

Semicarbazone


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

Hemiacetal


Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.

Semicarbazide and weak acid


Explain the mechanism of alkaline hydrolysis of tert-butyl bromide with energy profile diagram.


How will you convert sodium acetate to methane?


Benzaldehyde can be obtained from benzal chloride. Write reactions for obtaining benzalchloride and then benzaldehyde from it.


Identify the compounds A, B and C in the following reaction.

\[\ce{CH3 - Br ->[Mg/ether] (A) ->[(i) CO][(ii) Water] (B) ->[CH3OH/H+][Δ] (C)}\]


Grignard reagent on reaction with acetone forms.


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


In the following reaction

\[\ce{Carbonyl compound + MeOH <=>[HCl] acetal}\]

Rate of the reaction is the highest for ______.


Draw structure of the following derivative.

Acetaldehydedimethylacetal


Draw structures of the following derivative.

The ethylene ketal of hexan-3-one


Draw the structure of the following derivative.

Acetaldehydedimethylacetal


Draw the structure of the following derivative.

The ethylene ketal of hexan-3-one


Draw the structure of the given derivative.

The ethylene ketal of hexan-3-one


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