हिंदी

Write the name of the product when ketones react with 1,2-diol in presence of dry HCl.

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प्रश्न

Write the name of the product when ketones react with 1,2-diol in presence of dry HCl.

एक पंक्ति में उत्तर
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उत्तर

The product obtained when ketones react with 1,2-diol in presence of dry HCl is known as cyclic ketal.

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अध्याय 12: Aldehydes, Ketones and Carboxylic acids - Very Short Answer Questions

संबंधित प्रश्न

Benzaldehyde does NOT show positive test with ______.


Answer in brief.

Observe the following equation of reaction of Tollens' reagent with aldehyde. How do we know that a redox reaction has taken place? Explain.

\[\ce{R-CHO + 2Ag(NH_{3})^{+}_{2} + OH^{-}->[\triangle] R-CO{O}^{-} + 2Ag↓ + 4NH3 + 2H2O}\]


Addition of sodium bisulphite to ethanol is ____________ type of reaction.


Identify B in the following reaction,

\[\ce{Acetaldoxime ->[Na][alcohol] A ->[NaNO2][HCl] B + H2O + N2\uparrow}\]


An aldehyde or ketone reacts with hydrogen cyanide to form corresponding cyanohydrin derivatives. This reaction is an example of ____________.


Fehling solution is ____________.


In Clemmensen's reaction, ketone gives ____________.


Acetone on Clemmensen reduction gives ____________.


Which of the following is a Wolf - Kishner reduction?


Which of the following reagents is used for the following conversion?

\[\ce{CH3 - CH = CH - CHO -> CH3 - CH = CH - CH2OH}\]


Predict the product Z in the following series of reactions.

\[\ce{Ethanoic acid ->[PCl5] X ->[C6H6][Anhydrous AlCl3] Y ->[i) CH3MgBr][H3O^+] Z}\]


Identify the product formed in the reaction.


Assertion: p-N, N-dimethyl amino benzaldehyde undergoes benzoin condensation

Reason: The aldehydic (−CHO) group is meta directing.


Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid.


Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ____________.


Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ____________.


How will you convert benzaldehyde into the following compound?

Benzoic acid


What is the action of HCN on ethanal?


How is the following conversion effected Hex-3-yne into hexan-3-one?


Which of the following compounds is most reactive towards nucleophilic addition reactions?


Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of ______.


Which of the following is not correctly matched?


Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.


A carbonyl compound A having molecular formula C5H10O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.


How are the following compound obtained from alkyne?

Acetone


Write the structure of the products obtained from the following ketones by action of hydrazine in presence of a slightly acidic medium.




Write the structure of the products obtained from the following ketones by action of hydrazine in presence of strong base KOH.


Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.


How will you prepare Acetic anhydride from acetic acid.


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