PUC Science 2nd PUC Class 12 - Karnataka Board PUC Important Questions for Chemistry

Define the following terms: Lyophilic colloid

Define the following terms: Associated colloids

Write a method by which lyophobic colloids can be coagulated.

Write a method by which lyophobic colloids can be coagulated.

Write the IUPAC name of the given compound:

Write down the IUPAC name of the following complex: [Co(NH₃)₅ (NO₂)](NO₃)₂

Using IUPAC norms, write the formula for the following: 

Potassium tetracyanidonickelate(II)

Give reasons for the following observations:

Physisorption decreases with increase in temperature.

Give reasons for the following observations: Addition of alum purifies the water

Give reasons for the following observations:

Brownian movement provides stability to the colloidal solution.

On the basis of crystal field theory, write the electronic configuration for d⁴ ion if Δ₀ > P.

What is the effect of temperature on chemisorption ?

Why is adsorption always exothermic?

Explain what is observed when an electric current is passed through a colloidal sol?

Explain [Co(NH₃)₆]³⁺ is an inner orbital complex, whereas [Ni(NH₃)₆]²⁺ is an outer orbital complex.

[At. No.: Co = 27, Ni = 28]

What is meant by unidentate ligand?

Using IUPAC norms, write the formula for the following:

Potassium tetrachloridopalladate(II)

Using IUPAC norms, write the formula for the following: 

Hexaamminecobalt (III) sulphate

Using IUPAC norms, write the systematic name of the following:

[Co(NH₃)₄Cl(NO₂)]Cl

What is meant by the chelate effect?