CHEMISTRY IMPORTANT QUESTIONS R13 B.tech First Year

13 Apr 2015    02:50 pm

Following units are important and easy units in Chemisrty...


UNIT-I           ELECTRO CHEMISTRY& CORROSION

  1. Define (i) Specific conductance (ii) Equivalent conductance (iii)Molar conductance (iv) Cell constant
  2. Discuss the effect of dilution (i)Define battery. Differentiate between primary and secondary cells.(ii)Explain the construction and working lead-acid battery
  3. Explain the construction and working of the following electrodes (i)Calomel    (ii) Quinhydrone        (iii) Glass electrode
  4. Write about concentration cells
  5. What is cathodic protection? Explain sacrificial anode and impressed current cathodic protection    
  6. a) Differentiate between galvanising and tinning b) Paints and its constituents
  7. a) Differentiate between dry and wet corrosion b) Discuss the mechanism of wet corrosion with special reference of rusting of iron
  8. Write notes on (i) Galvanic corrosion  (ii) Differential aeration (iii) Crevice, pitting corrosion
  9. Write about factors affecting rate of corrosion
  10. Coatings by hot dipping
  11. Write a note on hydrogen-oxygen fuel cell and methanol-oxygen fuel cell.
  12. Write about electro plating of copper and electroless plating of Nickel
  13. Differentiate between galvanic series and electro chemical series.

UNIT – II             POLYMERS

  1. a) Explain the terms chain and step-growth polymerizations with appropriate examples. b) Describe the preparation, properties and uses of the following (i) PVC        (ii) Teflon      (iii) Bakelite     (iv) Nylon-6,6     (v) Dacron
  2. Write the differences between thermoplastic and thermosetting resins.
  3. What is a plastic? Explain a method of compounding and fabrication of plastics.
  4. What is a natural rubber? Why is it processed? Explain the process of vulcanization.
  5. Write a note on preparation, properties and applications of the following elastomers (i)BUNA-S        (ii) Butyl rubber       (iii) Thiokol rubber
  6. Write a note on Fibre reinforced plastics.
  7. What are conducting polymers? Explain the role of poly acetylene as conducting polymers.
  8. What are bio-degradable polymers? Explain the preparation and applications of Poly vinyl acetate and poly-Lactic acid.
  9. Discuss the manufacture of cement by dry and wet process.
  10. Explain setting and hardening of cement. Give necessary equations.
  11. What are lubricants? Discuss the mechanism of lubrication.
  12. Explain the following properties of lubricants. (i) Viscosity   (ii) viscosity index   (iii) Flash and Fire point   (iv) Cloud and Pour point
  13. Differentiate between Flash point and Fire point, Pour point and Cloud point.
  14. a) What are refractories? What are the criteria of good refractories? b) Classification of refractories.
  15. Explain the following properties of  refractories (i) Refractoriness      (ii) Chemical inertness   (iii) Dimensional stability   (iv) Porosity   (v) Thermal spalling
  16. What are nano materials? Explain sol-gel method of preparation of nano materials.
  17. Write notes on applications of nano materials.

 
UNIT-III      WATER

 

  1. What is carbonate and non-carbonate hardness? Give various units of hardness
  2. Explain ion- exchange method
  3. Write notes on all the boiler trouble
  4. Write a note on (i) reverse osmosis (ii) Electro dialysis
  5. Explain Zeolite process
  6. EDTA method of estimation of hardness
  7. Numerical on temporary, permanent and total hardness
  8. Write a note on Phosphate, colloidal and Calgon conditioning of water.
  9. What are specifications of potable water? Write the steps involved in treatment of potable water

             
UNIT-IV                  ENERGY SOURCES

 

  1. Proximate and ultimate analysis
  2. Classification of fuels and refining of petroleum
  3. What is cracking? Write a note on fixed bed catalytic cracking
  4. Bergius and Fischer tropsch process for synthesis of petrol.
  5. Explain flue gas analysis by Orsat’s process
  6. Junker calorimeter for CV of gaseous fuels
  7. Define calorific value,HCV,LCV,flue gas and numerical


UNIT-V    PHASE RULE& SURFACE CHEMISTRY      

     

  1. Define phase rule and explain terms in it. Write their advantages and limitations.
  2. What is meant by one component system? With a neat phase diagram explain water system
  3. a) What is condensed phase rule? Explain Ag-pb system. b)Explain de-silverisation of argentiferous lead
  4. Explain Fe-C system
  5. Write notes on (a) Hardening   (b) Annealing (c) Nitriding (d) Cyaniding
  6. Differentiate between triple point and eutectic point
  7. a) Differentiate between physical and chemical adsorption. b) Derive Langmuir adsorption isotherm.
  8. a) Differentiate between lyophilic and  lyophobic colloids. b) Explain Tyndal effect.
  9. Write notes on   i) Electrophoresis        ii) Electro dialysis (or) electro osmosis
  10. Write notes on protective action of lyophilic colloids.
  11. Discuss the applications of   i) Adsorption   ii) Colloids.
  12. Write notes on micelles.
  13. Write notes on   i) Fullerenes      ii) Carbon nano tubes.