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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

What is the action of following on proponal? Hydrazine

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प्रश्न

What is the action of following on proponal?

Hydrazine

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उत्तर

Propanal will undergo an addition elimination reaction with hydrazine to give corresponding hydrazone derivative containing C = N bond (imine).

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{....................................}\ce{H}\phantom{.......}\\
\phantom{}|\phantom{.....................................}|\phantom{........}\\
\ce{\underset{\text{Propanal}}{H3CH2C - C = O} + \underset{\text{Hydrazine}}{H2N - NH2}->\underset{\text{Hydrazone derivative}}{H3CH2C - C = N - NH2} + H2O}
\end{array}\]

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पाठ 12: Aldehydes, Ketones and Carboxylic acids - Short answer questions (Type-I)

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एससीईआरटी महाराष्ट्र Chemistry [English] Standard 12 Maharashtra State Board
पाठ 12 Aldehydes, Ketones and Carboxylic acids
Short answer questions (Type-I) | Q 5.2

संबंधित प्रश्‍न

Correct order of acid strength for

  1. acetic acid
  2. fluoroacetic acid
  3. 4-Nitrobenzoic acid 
  4. 4-Methyl benzoic acid is ______.

Write the reducing agent which CANNOT reduce –COOH group.


Write the preparation reactions for acid amide from the following.

Acid chloride


Write reactions for the following conversions.

Propanone to Propane


Write reactions for the following conversions.

4-Nitrobenzoic acid to Nitrobenzene


Write chemical reactions to convert –COOH group of acetic acid into the following.

CH4


Write chemical reactions to convert –COOH group of acetic acid into the following.

CH3COCl


Write reaction for preparation of acetophenone from benzoyl chloride.


Write reactions for the action of the following reagents on p-chlorobenzaldehyde.

Ethane-1,2-diol in presence of dry HCl.


Complete the following sequence of reactions and write structures for A, B, C.

\[\ce{Dry ice ->[i. Dry ether][ii. Hydrolysis] A ->[PCl5] B ->[H2(gas)][Pd - BaSO4] C}\]


Which of the following compounds reacts with ammonia to form urotropine?


In the reaction, \[\ce{C6H5COCH3 ->[{[H]}][Zn-Hg/conc. HCl] X}\], X is ______.


In the following reaction:

The product X is:


A flavouring agent found in oil of wintergreen is ______.


The elimination of CO2 from a carboxylic acid is known as ____________.


What amount of dinitrogen contains 3.6 × 1018 molecules?


The reducing agent preferred to convert carboxylic acids and esters to primary alcohols is ____________.


Which of the following aromatic acids has less acidic strength than benzoic acid?


Which of the following compounds is obtained when ethanoic anhydride is treated with water?


Which of the following carboxylic acids ha highest acidic strength?


Write structure of adipic acid.


The number of bonding pairs and lone pairs of electrons present in the central atom of ammonia molecular are respectively.


Which of the following can reduce?

\[\ce{RCOOH -> RCH2OH}\]


Draw structures 01 conjugate bases of monochloroacetic acid and dichloroacetic acid. Which one is more stabilized by -I effect?


Identify 'A', 'B' and 'C' in following chain reaction and rewrite the chemical reactions:
\[\ce{CH3CH2OH ->[red 'P'][Br2] A ->[KCN][alc] B ->[LiAlH4][Ether] C}\]

Identify the product ‘B’ in the following sequence of reactions.

\[\ce{\underset{}{Methylpropanoate} ->[Δ][dil. NaOH] \underset{\underset{}{}}{A}->[H+][Conc. HCl] \underset{\underset{}{}}{B}}\]


Which among the following is the strongest acid?


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