Explain how thermometric titrations are different than classical titrations. Discuss their advantages. 
(b) What is the principle of differential scanning calorimetry (DSC)? Draw the schematic diagram of a DSC instrument. 

Name four types of hydrogels based on four their composition.

 What is common source of errors in thermogravimetric analysis (TGA)? A mixture of CaO and  is analysed by TGA. The result indicates that mass of the sample decreases from  to  only between  and . Calculate the percentage of calcium carbonate in the mixture. 

Give the products formed by aerobic and anaerobic biodegradation of biodegradable polymers.

What are amperometric titrations? Draw common types of curves obtained in amperometric titrations. What will be the shape of the curve in bioamperometry for the titration of iodine by thiosulphate? 

Discuss the mechanism of biological degradation of polymers by microorganisms.

 Discuss how pH-sensitive smart polymers can be used in glucose sensors.

 Name any two polycarboxylic acids which can behave as pH-responsive polymers.

 Indium and Cadmium ions in 0.1 M HCl give peaks at potentials -0.557 V and -0.597 V by differential pulse polarographic analysis. When a standard solution containing 0.4 ppm of indium is analysed, it gave peak current (in arbitrary units) corresponding to 100.25 at -0.557 V and 43.75 at -0.597 V. A standard solution containing 0.4 ppm of Cd gave i_p 29.52 at -0.557 V and 64.8 at -0.597 V. What is the concentration of indium and cadmium in a sample if the peak current is 190 at -0.557 V and 120 at -0.597 V. 

 What features are required in a conducting polymer?

What is dropping mercury electrode? Give its advantages. 

Discuss the free electron molecular orbital model of conduction in conducting polymers.

 In a coulometric method, 200 mg of nitrobenzene in  of methanol is reduced to phenyl hydroxylamine at a constant potential of -0.95 V (vs. SCE) applied to an Hg electrode. Following reaction takes 30 minutes to complete.
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Calculate the percentage of nitrobenzene if above reduction requires 32mA current. 

What is Coulometer? Explain briefly. Write cathodic and anodic reaction of hydrogen-nitrogen coulometer, where 0.1 M hydrazine sulphate is used as the electrolyte. 

In the kinetics of uncatalysed step growth polymerisation, arrive at the following expression:

Calculate the EMF of the cell. Where,
 and 

Which type of initiators can be used to initiate anionic polymerisation? Give any two examples.

 Consider the following electrochemical cell 
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Consider the following electrochemical cell 

Give one example each for an addition and a condensation polymer.