Q10 of 46 Page 1

Define the following terms with suitable examples of each:

(a) Polydentate ligand


(b) Homoleptic complex


OR


Using IUPAC norms, write the formulae for the following complexes:


(a) Potassium tri(oxalato)chromate(III)


(b) Hexaaquamanganese(II) sulphate


(a) When several donor atoms are present in a single ligand, it is called polydentate ligand. E.g. edta4- (ethylenediaminetetraacetate), it is a hexa dentate ligand i.e. it can bind with metal through ^ sites as given below-


2000px-Metal-EDTA.svg.png


(b) Homoleptic complexes are those in which metal is bound to only one kind of donor atoms. E.g. [Co(NH3)6]3+, here all the 6 donor atoms/ligands are same that is ammine.


OR


(a) K3[Cr(C2O4)3]


(oxalate is a bidentate ligand)


(b) [Mn(H2O)6]SO4


(aqua is a neutral ligand)


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5

What is the difference between amylose and amylopectin.

OR


Write the products obtained after hydrolysis of lactose.


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Give reasons:

(a) An increase in temperature is observed on mixing chloroform and acetone.


(b) Aquatic animals are more comfortable in cold water than in warm water.


 14

(a) Write the dispersed phase and dispersion medium of butter.

(b) Why does physisorption decrease with increase in temperature?


(c) A colloidal sol is prepared by the given method in figure. What is the charge on AgI colloidal particles formed in the test tube? How is this sol represented?


hehe.png


 17

Write the principle of the following:

(a) Hydraulic Washing


(b) Chromatography


(c) Froth- floatation process