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Ten thousand litres of hard water was made soft with zeolite. The exhausted zeolite required a total amount of 8 lit of NaCl solution containing 150 gm per litre for regeneration. Calculate the hardness of water.
Concept: Hardness of Water
Explain lon-exchange process for Softening of hard water. What are its advantages and disadvantages.
Concept: Ion Exchange Process and Numerical Problems
Write a note on Deccay of Concrete.
Concept: Softening of water by Hot and Cold lime Soda method and numerical problems
15000 litres of hard water was passed through a zeolite softener. The exhausted zeolite required 120 litres of NaCI having stream of 30g/l of NaCL Calculate the hardness of water.
Concept: Hardness of Water
Write a note on Ultrafiltration method for purification of water.
Concept: Hardness of Water
Distinguish between temporary and permanent hardness of water.
Concept: Hardness of Water
Explain the principle of EDTA method .
Concept: Determination of Hardness of Water by Edta Method and Problems
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
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
BUNA-S
Concept: Production of Substances > Rubber >> Properties and Uses of Buna‐S
