Science (English Medium) Class 12 - CBSE Important Questions for Chemistry

Write the IUPAC name of the following complex:

[Pt(NH₃)₆]Cl₄

Using IUPAC norms, write the formula for the following:

Pentaamminenitrito-N-Cobalt (III)

Using IUPAC norms write the formula for the following:

Tetrahydroxidozincate (II)

Predict the reagent for carrying out the following transformations:

Benzoyl chloride to Benzaldehyde

Predict the reagent for carrying out the following transformations:

Ethanal to 3-hydroxy butanal

Which of the following does not give aldol condensation reaction?

Which of the following does not give Cannizzaro reaction?

Aldehydes and ketones react with hydroxylamine to form ______.

The reagent that can be used to distinguish acetophenone and benzophenone is ______.

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

Do the following conversions in not more than two steps:

CH₃COOH to CH₃COCH₃

Do the following conversions in not more than two steps:

Assertion (A): Acetic acid but not formic acid, can be halogenated in the presence of red P and Cl₂.

Reason (R): Acetic acid is a weaker acid than formic acid.

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.

Identify A and B:

What is IUPAC name of the ketone A, which undergoes iodo form reaction to give \[\ce{CH3CH = C(CH3)COONa}\] and yellow precipitate of \[\ce{CH3}\]?

Assertion (A): Strong oxidising agents oxidise toluene and its derivatives to benzoic acids.

Reason (R): It is possible to stop the oxidation of toluene at the aldehyde stage with suitable reagents.

Select the most appropriate answer from the options given below:

Out of p-tolualdehyde and p-nitrobenzaldehyde, which one is more reactive towards nucleophilic addition reactions, why?

Write the structure of the product formed when acetone reacts with 2, 4 DNP reagent.

Convert the following:

Benzene to m-nitrobenzaldehyde