Wednesday , January 23 2019

B tech First Year CHEMISTRY IMPORTANT QUESTIONS

B tech First Year CHEMISTRY IMPORTANT QUESTIONS

Unit wise important questions are listed below:B tech First Year CHEMISTRY IMPORTANT QUESTIONS

B tech First Year CHEMISTRY IMPORTANT QUESTIONS

NOTE: These Questions are not exactly the important questions we are just giving the models and some previous questions, JNTUWORLDFORUM.COM suggest you to prepare all question and answers.

 B tech First Year CHEMISTRY IMPORTANT QUESTIONS
UNIT-I           ELECTRO CHEMISTRY& CORROSION
Define
(i) Specific conductance
(ii) Equivalent conductance
(iii)Molar conductance
(iv) Cell constant
Discuss the effect of dilution
(i)Define battery. Differentiate between primary and secondary cells.
(ii)Explain the construction and working lead-acid battery
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

(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
(a) Write the differences between thermoplastic and thermosetting resins.
(b) What is a plastic? Explain a method of compounding and fabrication of plastics.
(a) What is a natural rubber? Why is it processed? Explain the process of vulcanization.
(b) Write a note on preparation, properties and applications of the following elastomers
(i)BUNA-S        (ii) Butyl rubber       (iii) Thiokol rubber
(a) Write a note on Fibre reinforced plastics.
(b) What are conducting polymers? Explain the role of poly acetylene as conducting polymers.
What are bio-degradable polymers? Explain the preparation and applications of Poly vinyl acetate and poly
Lactic acid.
(a) Discuss the manufacture of cement by dry and wet process.
(b) Explain setting and hardening of cement. Give necessary equations.
(a) What are lubricants? Discuss the mechanism of lubrication.
(b) Explain the following properties of lubricants.
(i) Viscosity   (ii) viscosity index   (iii) Flash and Fire point   (iv) Cloud and Pour point
Differentiate between Flash point and Fire point, Pour point and Cloud point.
(a) What are refractories? What are the criteria of good refractories?
(b) Classification of refractories.
Explain the following properties of  refractories
(i) Refractoriness      (ii) Chemical inertness   (iii) Dimensional stability   (iv) Porosity   (v) Thermal spalling
(a) What are nano materials? Explain sol-gel method of preparation of nano materials.
(b) Write notes on applications of nano materials.
 
UNIT-III      WATER
(a) What is carbonate and non-carbonate hardness? Give various units of hardnes
(b)Explain ion- exchange method
Write notes on all the boiler trouble
Write a note on (i) reverse osmosis (ii) Electro dialysis
(a) Explain Zeolite process
(b)EDTA method of estimation of hardness
(c) Numerical on temporary, permanent and total hardness
Write a note on Phosphate, colloidal and Calgon conditioning of water.
What are specifications of potable water? Write the steps involved in treatment of potable water
 
UNIT-IV                  ENERGY SOURCES
Proximate and ultimate analysis
Classification of fuels and refining of petroleum
What is cracking? Write a note on fixed bed catalytic cracking
Bergius and Fischer tropsch process for synthesis of petrol.
Explain flue gas analysis by Orsat’s process
Junker calorimeter for CV of gaseous fuels
Define calorific value,HCV,LCV,flue gas and numerical
UNIT-V    PHASE RULE& SURFACE CHEMISTRY            
Define phase rule and explain terms in it. Write their advantages and limitations.
What is meant by one component system? With a neat phase diagram explain water system
(a) What is condensed phase rule? Explain Ag-pb system.
(b)Explain de-silverisation of argentiferous lead 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.
B tech First Year CHEMISTRY IMPORTANT QUESTIONS

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