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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C2H4O on oxidation with pyridinium chlorochromate. - Chemistry

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प्रश्न

An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C2H4O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.

दीर्घउत्तर
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उत्तर

Ethyl alcohol gives hydrogen on reaction with sodium metal. On oxidation with PCC ethanol will form acetaldehyde (C2H4O).

\[\ce{\underset{\text{Ethyl alcohol}}{2CH3 - CH2 - OH} ->[2Na] \underset{\text{Sodium ethoxide}}{2CH3 - CH2 - O- Na+} + {H_{2(g)}} ^}\]

\[\ce{\underset{\text{Ethyl alcohol}}{CH3 - CH2 - OH} ->[{[O]}][PCC] \underset{\ce{Acetaldehyde(C2H4O)}}{CH3 - CHO} + H2O}\]

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Alcohols and Phenols
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 11: Alcohols, Phenols and Ethers - Long Answer Questions

संबंधित प्रश्‍न

Answer in one sentence/ word.

Write the IUPAC name of alcohol having molecular formula C4H10O which is resistant towards oxidation.


Answer in brief.

Give the equations of the reactions for the preparation of phenol from isopropyl benezene.


An ether (A), C5H12O, when heated with excess of hot HI produce two alkyl halides which on hydrolysis form compound (B) and (C), oxidation of (B) gave and acid (D), whereas oxidation of (C) gave a ketone (E). Deduce the structural formula of (A), (B), (C), (D), and (E).


When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________


What is the action of following reagents on pent-3-enal?

  1. H2/Ni
  2. LiAlH4/H3O+

Write chemical equation of acetyl chloride with phenol


How will you bring about the following conversions?

isopropyl alcohol to acetone


Write chemical reactions to convert phenol into salicyaldehyde. Write the name of the reaction. What happens when if CCl4 is used instead of CHCl3 in the above reaction.


In the Lucas test for alcohols, the appearance of turbidity is due to the formation of ____________.


Phenol is obtained from cumene ____________.


The number of isomeric alcohols possible with the formula C4H10O is ____________.


Cumene is used in the commercial method for the manufacture of ____________.


Phenoxide ion is more stable than phenol due to the ____________.


The most resistant alcohol towards oxidation reaction is:


Which of the following alcohols has tertiary allylic carbon?


\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]

Identify product 'X' in the above reactions.


The number of moles of hydrogen gas formed when 2 moles of 2-methylpropan-2-ol reacts with aluminium is ____________.


Which of the following alcohols is least soluble in water?


Identify product B in the following conversion?

\[\ce{Phenol ->[NaOH] A ->[CH3I] B}\]


The acid, which contains both -OH and -COOR groups is ______.


Product (B) in this reaction is:


The order of reactivity of hydrogen halides with ether is as follows.


The major product obtained in the following reaction is 


Arrange the following compounds in an increasing order of their solubility in water:


Write chemical reaction when hot copper is treated with Vapours of 3° (tertiary) alcohol.


Explain: Phenols are acid while alcohol is neutral.


Convert the following :

cumene to phenol.


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