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

Cannizaro’s reaction is not given by ______. - Chemistry

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प्रश्न

Cannizaro’s reaction is not given by ______.

पर्याय

  • \[\ce{HCHO}\]

  • \[\ce{CH3CHO}\]

MCQ
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उत्तर

Cannizaro’s reaction is not given by \[\ce{CH3CHO}\].

Explanation:

\[\ce{CH3CHO}\] will not give Cannizzaro’s reaction because it contains a-hydrogen while other three compounds have no a-hydrogen. Hence, they will give Cannizzaro’s reaction.

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पाठ 12: Aldehydes, Ketones and Carboxylic Acids - Multiple Choice Questions (Type - I) [पृष्ठ १६९]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 12 Aldehydes, Ketones and Carboxylic Acids
Multiple Choice Questions (Type - I) | Q 6 | पृष्ठ १६९

संबंधित प्रश्‍न

 Why is alpha (α) hydrogen of carbonyl compounds acidic in nature?


What is substituted imine called?


Explain aldol condensation reaction in detail.


Which product is formed when the compound  is treated with concentrated aqueous \[\ce{KOH}\] solution?


Compounds A and C in the following reaction are:

\[\ce{CH3CHO ->[(i) CH3MgBr][(ii) H2O] (A) ->[H2SO4, Δ] (B) ->[Hydroboration oxidation] (C)}\]


Why is there a large difference in the boiling points of butanal and butan-1-ol?


Why are carboxylic acids more acidic than alcohols or phenols although all of them have hydrogen atom attached to a oxygen atom \[\ce{(-O-H)}\]?


Assertion: The α-hydrogen atom in carbonyl compounds is less acidic.

Reason: The anion formed after the loss of α-hydrogen atom is resonance stabilised.


Assertion: Aromatic aldehydes and formaldehyde undergo Cannizaro reaction.

Reason: Aromatic aldehydes are almost as reactive as formaldehyde.


Give reasons to support the answer:

Presence of Alpha hydrogen in aldehydes and ketones is essential for aldol condensation.


Convert the following:

Acetaldehyde to But-2-enal


Which of the following does not give aldol condensation reaction?


Which of the following compounds will undergo self-condensation in the presence of dilute NaOH solution?


Why is the α-hydrogens of aldehydes and ketones are acidic in nature?


When acetaldehyde is treated with dilute NaOH, the following reaction is observed.

\[\begin{array}{cc}
\ce{2CH3 - CHO ->[dil.NaOH] CH3 - CH - CH2 - CHO}\\
\phantom{...............}|\\
\phantom{.................}\ce{OH}
\end{array}\]

  1. What are the functional groups in the product?
  2. Can another product be formed during the same reaction? (Deduce the answer by doing atomic audit of reactant and product).
  3. Is this an addition reaction or condensation reaction?

Write a note on the aldol condensation reaction of acetaldehyde.


What is aldol condensation? Explain it with suitable examples.


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