STUPIDSID
Solve Any Five
1 (a)
What Happens when temporary hard water is boiled ? Give equation to explain.
3 M
1 (b)
Give the preperation and uses of Silica refractory.
3 M
1 (c)
Define Gibbs Phase Rule. State the number of Phases, Components and Degree of freedom for the following equation -
CaCo3(s) ? CaO(s) + CO2(g)
CaCo3(s) ? CaO(s) + CO2(g)
3 M
1 (d)
What is the function of plasticiser in the compounding of plastic? Give two examples.
3 M
1 (e)
Two samples of water A and B were analysis for their salt content :
(i) Sample A was found to contain 168 mg MgCO3 per litre.
(ii) Sample B was found to contain 820 mg Ca(NO3)2 per litre and 2 mg SiO2 per litre. Calculate the total hardness of each sample and state which sample is more hard.
(i) Sample A was found to contain 168 mg MgCO3 per litre.
(ii) Sample B was found to contain 820 mg Ca(NO3)2 per litre and 2 mg SiO2 per litre. Calculate the total hardness of each sample and state which sample is more hard.
3 M
1 (f)
Discuss the condition under which semisolid lubricants are used.
3 M
1 (g)
Distinguish between thermoplastics and thermosetting resins.
3 M
2 (a)
50 ml of standard hard water containing 1 mg of pure CaCO3 per ml consued 20 ml of EDTA. 50 ml of the water sample consumed 30 ml of same EDTA solution using Erichrome Black T indicator. After boiling and filtering, 50 ml of the water sample required 10 ml of the same EDTA for titration. Calculate the total and permanent hardness of water sample.
6 M
2 (b)
Draw a neat phase diagram of the one component water system and explain with reference to (i) curves (ii) Triple point
5 M
2 (c)
What are carbon nano tubes ? What are their types? Discuss their Electrical and Mechanical properties.
4 M
3 (a)
Discuss the mechanism of thick- film lubrication.
6 M
3 (b)
Discuss moduling and discuss the Injection moduling method of fabrication of plastic.
5 M
3 (c)
Discuss the Limitations of phase rule.
4 M
4 (a)
Give the preperation, properties and uses of : (i) PMMA (ii) Buna-s
6 M
4 (b)
Give well balanced equation of the reactions that takes place in the Lime soda process.
5 M
4 (c)
Find the saponification value of an oil sample 1.5g refluxed with 25 ml of 0.5 N KOH required 15 ml of 0.5 N HCI for the residual titration. The blank titration reading was 25 ml of 0.5 N HCI.
4 M
5 (a)
Discuss the setting and hardening of portland cement as well as the function of gypsum with balanced equations.
6 M
5 (b)
What is glass transition temperature? What are the factor that affect it and what is the signification of it.
5 M
5 (c)
An exhausted zeolite softner was regenerated by passing 150 litres of NaCI solution having a strength of 150 g/L of NaCI. If the hardness of the water is 600 ppm. Calculate the total volume of water that is softned by the softner.
4 M
Write short notes on any two :-
6 (a) (i)
Reverse osmosis
3 M
6 (a) (ii)
Electrodialysis
3 M
6 (a) (iii)
Ultrafiltration
3 M
6 (b)
Define conducting polymers. Explain Intrinsic and Doped conducting polymer with approprite examples.
5 M
6 (c)
Define and discuss the significance of the following properties of lubricant (any two) :-
(i) Acid value of oil
(ii) Cloud and Pour point
(iii) Flash and Fire point
(i) Acid value of oil
(ii) Cloud and Pour point
(iii) Flash and Fire point
4 M
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