common ion effect

(i). For a weak monobasic acid K_(a)=10^(_5) and pH=5 then degree of dissociation of acid is 50% (ii). [H_(2)SO_(4)]=0.1M" "V=400ml [NaOH]=0.1M" "V=400ml on mixing these solution pH is approximately 1.3 (iii). Ionic product of water depends on temeprature (iv). Le-chatelier's principal is not applicable for common ion effect. Select the correct options:

Solubility and solubility product | Common ion effect on solubility | Simultaneous solubility | Precipitation reactions | Indicator theory and Acid-Base filtrations | pH Calculation of mixture based Questions

The concept of cmmon ion effect applies to the dissociation of weak electrolytes. Their dissociation gets further suppressed in the presence of common ions furnished by a suitable electrolyte. Similarly the solubility of sparingly soluble salts in water gets suppresessed by the presence of a common ions. You are provided with an aqueous solution containing Cu^(2+) " and " Zn^(2+) ions. (i) How are these ions precipitated from the solution (ii) What is the colour of the precipiate formed ? (iii) How does dilute HCI help in checking the precipitation of Zn^(2+) ions in group II? (iv) How does NH_(4)OH help in promoting the precipitation of Zn^(2+) ions in group IV?

pH calculation of strong acid and base | Mixture of strong acids and bases |Common Ion effect | Le- Chatlier's principle | Effect on change in concentration,pressure,volume, addition/removal,temperature and by addition of catalyst on equilibrium Questions

Give the common effects of radioactive pollution. List the steps for its control.

A : Baculovirus are species specific. R : It is very common in root ecosystem and effective against several plant pathogens.

Which biocontrol agent in very common in root ecosystem & is effective against several plant pathogens.

Assertion (A) : pH of aqueous solutin decreases when NaCN is added to it . Reason (R ) : NaCN provides a common ion to HCN.