Class 12th

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Solution:  (b, d)
Clemmensen reduction is used to convert cyclohexanone into cyclohexane and benzophenone into diphenyl methane .

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct options: B and C

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct options: B and D

 Consider the following product CH₃ -CHO C and O are broken into positive and negative bonds. C should have one condition: hydrogen must be available; if it isn't, aldol condensation will not occur. When two products are mixed with the availability of - hydrogen, the positive and negative bonds between carbon and hydrogen are exchanged, and water (H₂0) is eliminated, resulting in aldol condensation.

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct option: A

The Clemmensen Reduction method is used to reduce a carbonyl group to CH2. Amalgams are a type of reducing agent that has been around for a long time. In the Clemmensen reduction, hydrogen chloride acts as an acid, protonating the ketone and transferring the electrons from the zinc amalgam to the carbon atoms

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct option: B

When a primary alcohol, such as Butan-1-ol, reacts with a powerful oxidising agent, such as KMnO₄, it produces carboxylic acid, however when a secondary alcohol, such as Butan-2-ol, is oxidised under the pressure of KMnO₄, it produces ketone. As a result, option B is right.

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct option: C

_I2 and NaOH It is an iodoform reaction involving methyl ketones, the solution is the correct reagent. Because the reactants and product have double bonds, double bonds do not work throughout the reaction. There are also ketone and carboxylic groups present. The ketonic group is oxidised under the carboxylic group during the process. 

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct option: B

The position of a functional group in the same carbon chain differs in positional isomerism. The functional group in the chemical or the unsaturated double or triple bond in the compound can help us figure it out.

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option: D

Tautomers are structural isomers that exist in two or more interconvertible structures of a single chemical molecule. Tautomerism transforms 'A' into acetone.

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct option: B

In KOH adds to the compound

Due to the production of a stable conjugate base after hydronium is removed from phenol, it is more stable than alcohol.

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Correct options: D

Aldehydes without a - hydrogen atom are the subject of Cannizaro's reaction.

Option D, CH₃CHO has 3 alpha  hydrogen atoms and it does not give Cannizaro's reaction