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Explain the principle of EDTA method .
Concept: Determination of Hardness of Water by Edta Method and Problems
20 ml sample of waste water was refluxed with 30 ml of potassium dichromate solution and after refluxing the excess unreacted dichromate required 11 ml of 0.1 N FAS solution . Blank of 20 ml of distilled water on refluxing with 30 ml of dichromate solution required 14 ml of 0.1 N FAS solution . Calculate the COD value of waste water .
Concept: Sewage Treatment
A sample of water contains following impurities :
Mg(HCO3)2 =73 mg/lit , MgSO4 = 120 mg/lit , CaCl2 = 222 mg/lit and Ca(NO3)2 = 164 mg/lit . The purity of lime is 74% and soda is 90% . Calculate the quantity of lime and soda needed for softening of 50,000 litres of water .
Concept: Softening of water by Hot and Cold lime Soda method and numerical problems
A zeolite softener was completely exhausted and was generated by passing 1000 litres of NaCl .How many litres of a sample of hardness 500 ppm can be softened by this softener ?
Concept: Hardness of Water
Draw the diagram for demineralization process and write suitable reactions involved in the process .What are the advantages and disadvantages of the method .
Concept: Determination of Hardness of Water by Edta Method and Problems
Explain Activated sludge method with the help of diagram
Concept: Sewage Treatment
Write a short note on Reverse Osmosis .
Concept: Drinking Water Or Municipal Water
What is meant by Fabrication of plastics? Explain injection moulding with the help of neat diagram .
Concept: Fabrication of Plastic by Injection
Discuss the drawback of natural rubber.
Concept: Drawbacks of Natural Rubber
What is the functions of fillers and plastisizers in the compounding of plastic?
Concept: Compounding of Plastic
Write the preparation, properties and uses of PMMA and Buna-S.
Concept: Preparation, properties and uses of PMMA
Define Moulding. List the different techniques of moulding. Explain injection moulding with the help of neat diagram.
Concept: Fabrication of Plastic by Injection
Give the preparation, properties and uses of polymethyl methacrylate polymer.
Concept: Preparation, properties and uses of PMMA
What are the draw backs of natural rubber?
Concept: Natural Rubber- Latex
Discuss the following additives in compounding of plastics
(a) Fillers (b) Plasticizers.
Concept: Compounding of Plastic
Write a short note on Injection moulding method for plastic.
Concept: Thermosetting plastic
Define Fabrication. List the methods used. Discuss extrusion moulding in detail.
Concept: Fabrication of plastic by Extrusion moulding
What are the additives mixed with plastics for its compounding? Explain their functions.
Concept: Compounding of Plastic
