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

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?

Write the IUPAC names of the following coordination compounds: 

[CoBr₂(en)₂]⁺, (en = ethylenediamine)

Write the fomulae of the following compounds :

Tetraaquodichlorochromium (III) chloride

Write the fomulae of the following compounds

Potassium tetracyanoaurate (III) ion

Give one example each of lyophobic sol and lyophilic sol.

Give one example each of lyophobic sol and lyophilic sol.

Explain the following, giving two examples: 

Homoleptic

Give an example of chelate effect.