(i) What is meant by promoter? Give an example.   

(ii) The solubility product of BaS04 is 1.5 x 10^-9. Find out its solubility in pure water. [1]

(iii) What is the discociation constant of 0.1M solution of a week add HA which is 4.5% ionized at 20°C 

Give the IUPAC names for the following:    [2]

(i) Na₃[AlF₃]

(ii) [Co(NH₃)₆]C

For the complex -ion of [Fe(CN)₆]^-3:

(i) Show the hybridization diagrammatically.

(ii) Is it an inner orbital complex or an outer orbital complex?

(iii) State its magnetic property.

27.

Give balanced the chemcial equations for the following:    

(i) Chlorine gas is passed through cold, dilute NaOH.

(ii) Sulphur dioxide gas is passed through NaOH solution.

(iii) Zinc is added to sodium agrentocyanide solution.

State the common oxidation state of:    

(i) Lanthanides

(ii) Actinides