PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

Give a plausible explanation for the following:

Why are aliphatic amines stronger bases than aromatic amines?

Complete the following reaction:

\[\ce{C6H5N2Cl + H3PO2 + H2O ->}\]

Write the structure of the product of the following reaction:

Predict the product of the following reaction:

How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

p-Nitrobenzaldehyde

Give the equations of reactions for the preparation of phenol from cumene.

Write chemical reaction for the preparation of phenol from chlorobenzene.

You are given benzene, conc. H₂SO₄ and NaOH. Write the equations for the preparation of phenol using these reagents.

Write the equation for the preparation of 1-iodobutane from but-1-ene.

How will you bring about the following conversion?

Ethane to bromoethene

How the following conversion can be carried out?

Aniline to chlorobenzene

What happens when white phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO₂?

Explain effects of lanthanoid contraction.

What are the consequences of lanthanoid contraction?

Write the IUPAC name of the following coordination compound:

K₃[Fe(CN)₆]

Write the IUPAC names of the following coordination compounds: 

[CoBr₂(en)₂]⁺, (en = ethylenediamine)

Identify that the following compound is insoluble, partially soluble and highly soluble in water.

phenol

Identify that the following compound is insoluble, partially soluble and highly soluble in water.

Toluene

Identify that the following compound is insoluble, partially soluble or highly soluble in water:

Formic acid

Identify that the following compound is insoluble, partially soluble or highly soluble in water:

Ethylene glycol