a) How are Polymers classified?
b) Define polymerization. Differentiate addition and condensation polymerization.
a) describe the free radical mechanism of addition polymerization taking ethylene as a monomer.
b) Give the synthesis and applications of Teflon.
a) Differentiate between thermoplastics and thermosetting plastics.
b) What is glass transition temperature?Discuss the following factors affecting GTT i) Flexibility ii) Intermolecular forces.
a) describe the manufacture and applications of the following high polymers: i)Polymethylmethacrylates (plexi glass) ii) polyurethanes.
b) What are elastomers? Mention the advantages of synthetic rubber over natural rubber.
a) What are the deficiencies of natural rubber? What is vulcanization of rubber.
b) describe the manufacture of Silicone rubber. Mention their applications.
problem 1: Discuss the relation between the structure and following properties of polymers a) Crystallinity b) Elasticity
problem 2: describe the manufacture of Neoprene rubber. Mention their applications.
problem 3: describe the manufacture of Butyl rubber. Mention their applications.
problem 4: Give the synthesis and applications Phenol Formaldehyde.
problem 5: Define the following i) Functionality ii) Degree of polymerization.
a) describe the construction and working of catalytic converter with a neat diagram.
b) How much of rise in temperature of water occurs when 0.222 kg of a fuel is burnt in bomb calorimeter containing 4.6 kg of water, if the gross calorific value of the fuel is 2424 kJkg-1 and water equivalent of calorimeter is 3.3kg. Specific heat of water = 4.187 kJ kg-1 oC-1 .
a) Describe the experimental determination of calorific value of a fuel using bomb calorimeter.
b) describe Pulling technique for the production of Silicon Single crystal.
a) Define Octane number & Cetane number. Discuss the methods of improving octane number of a fuel.
b) What is power alcohol? describe how ethyl alcohol is manufactured from molasses.
a) prepare a note on anti knocking agents.
b) What is bio diesel? How is it prepared? What are the advantages?
a) What are photovoltaic cells? Mention the advantages and disadvantages.
b) describe the construction and working of PV Cells.
problem 1: What are chemical fuels? How they are classified? List the characteristics of a good fuel.
problem 2: Define cracking. describe the fluidized catalytic cracking method with neat diagram.
problem 3: Define knocking. describe the mechanism of knocking in petrol engines.
problem 4: What is meant by reforming? describe the principal reactions occurring during the reforming process.
problem 5: describe the production of solar grade silicon.
problem 6: find out Gross and Net Calorific value of a coal sample from the following data: Weight of coal sample = 0.795x10-3 kg; Wt of water taken in the calorimeter = 1.3 kg Water equivalent of Calorimeter = 2.5 kg; Initial Temperature of the water = 28 0C Final Temperature of the water = 29.8 0C; % of H2 in the coal sample = 2.5 Latent heat of steam = 2455 kJ/kg
a) Define EMF. Obtain the expression which relates the EMF of a cell with concentration.
b) The EMF of the cell Cd/Cd2+(0.01M)//Cu2+(0.5M)/Cu, is 0.79V. Determine the standard reduction potential of Cd electrode, if the standard electrode potential of copper is 0.34V
a) Justify the following statements:
- In a galvanic cell anode is –ve and cathode is +ve
- From a concentration cell, emf is available only as long as the electrolytes differ in their concentrations
- NH4NO3 or KCl is used for preparing salt bridge
b) For the cell Sn/Sn2+ (0.15M)//Ag+(0.3M)/Ag prepare the cell reaction and find out the emf of the cell at 298 K, if the standard electrode potentials of Sn and Ag electrodes are -0.14 and 0.8V respectively.
a) Define Standard electrode potential. describe the origin of electrode potential.
b)A cell is constructed by coupling a zinc electrode dipped in 0.5M ZnSO4 and a nickel electrode dipped in 0.05M NiSO4. prepare the cell representation and cell reaction. find out the EMF of the cell, given that standard reduction potential of Zn and Ni as -0.76 and -0.25V respectively.
a) describe the construction and working of a glass electrode with a neat diagram.
b) describe the measurement of pH of a solution using glass electrode.
a) Define a concentration cell. describe the working of a concentration cell with an ex.
b) The emf of the cell Ag/AgNO3 (0.05M)// AgNO3 (xM)/Ag is 0.12 V at 250 C. Find the value of x.
problem 1: describe the construction and working of Calomel electrode.
problem 2: Derive an expression for the electrode potential of a glass electrode.
problem 3: What are ion selective electrodes? describe the working principle of an ion selective electrode.
problem 4: describe the construction and working of Silver-Silver chloride electrode.
problem 5: What are the advantages and disadvantages of glass electrode?
problem 6: Two copper electrodes placed in copper sulphate solutions of equal concentration are connected to form a concentration cell. (1) What is the cell voltage? (2) If one of the solutions is diluted until the concentration of Cu2+ ions is 1/5th of its original value, what will be the cell voltage after dilution?