English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Compounds A and C in the following reaction are: CHX3CHO→(ii) HX2O(i) CHX3MgBr(A)→HX2SOX4,Δ(B)→Hydroboration oxidation(C) - Chemistry

Advertisements
Advertisements

Question

Compounds A and C in the following reaction are:

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

Options

  • identical

  • positional isomers

  • functional isomers

  • optical isomers

MCQ
Advertisements

Solution

positional isomers

Explanation:

Thus, \[\begin{array}{cc}
\ce{CH3CH - OH}\\
|\phantom{....}\\
\ce{CH3}\phantom{..}
\end{array}\] and  \[\ce{CH3 - CH2 - CH2OH}\] are positional isomers.

shaalaa.com
  Is there an error in this question or solution?
Chapter 12: Aldehydes, Ketones and Carboxylic Acids - Multiple Choice Questions (Type - I) [Page 170]

APPEARS IN

NCERT Exemplar Chemistry [English] Class 12
Chapter 12 Aldehydes, Ketones and Carboxylic Acids
Multiple Choice Questions (Type - I) | Q 9 | Page 170

RELATED QUESTIONS

Write the products formed when CH3CHO reacts with the following reagents: CH3CHO in the presence of dilute NaOH


How will you convert ethanal into the following compound?

Butane-1, 3-diol


Write structural formulas and names of four possible aldol condensation products from propanal and butanal. In each case, indicate which aldehyde acts as nucleophile and which as electrophile.


How will you bring about the following conversion in not more than two steps?

Ethanol to 3-Hydroxybutanal


Give reasons  Acetylation of aniline reduces its activation effect.


What is substituted imine called?


Explain aldol condensation reaction in detail.


What product will be formed on reaction of propanal with 2-methylpropanal in the presence of \[\ce{NaOH}\]? What products will be formed? Write the name of the reaction also.


When liquid ‘A’ is treated with a freshly prepared ammoniacal silver nitrate solution, it gives bright silver mirror. The liquid forms a white crystalline solid on treatment with sodium hydrogensulphite. Liquid ‘B’ also forms a white crystalline solid with sodium hydrogensulphite but it does not give test with ammoniacal silver nitrate. Which of the two liquids is aldehyde? Write the chemical equations of these reactions also.


Cross aldol condensation occurs between


Which of the following gives aldol con~ensation reaction?


Identify A and B from the following reaction:

\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\phantom{}\ce{2CH3 - C = O ->[Ba(OH)2] A ->[Δ] B + H2O}
\end{array}\]


Predict the reagent for carrying out the following transformations:

Ethanal to 3-hydroxy butanal


Explain Aldol condensation of ethanal.


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


Assertion (A): The final product in Aldol condensation is always α, β-unsaturated carbonyl compound.

Reason (R): α, β-unsaturated carbonyl compounds are stabilised due to conjugation.


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?

Which one of the following undergoes reaction with 50% sodiumhydroxide solution to give the corresponding alcohol and acid:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×