Date: December 2017
1.Question.No. 1 is compulsory.
2. Attempt any three question out of remaining five.
Select the compound which possesses highest octane number and highest cetanenumber out of n-heptane, n-octane and isooctane.
Chapter: [8] Fuels
Iron does not rust even if the zinc coating is broken in a galvanized iron pipe.Give reasons.
Chapter: [6] Corrosion
Calculate the higher and lower calorific values of coal sample contains 84%carbon, 1.5% sulphur, 0.6 Nitrogen, 5.5% hydrogen and 8.4% oxygen.
Chapter: [6] Corrosion
What are drawbacks of plain carbon steel
Chapter: [7] Alloys
Explain the principle ‘Prevention of waste’ in green chemistry.
Chapter: [10] Green Chemistry
Define and classify composite materials.
Chapter: [9] Composite Materials
Mention three functions of thinner in paint.
Chapter: [6] Corrosion
Define corrosion of metals. Explain the electrochemical theory of wet corrosion, giving its mechanism.
Chapter: [6] Corrosion
1.56g of coal sample was kjeldahlished and `NH_3` gas thus evolved was absorbed in 50ml of 0.1N `H_2SO_4`. After absorption to excess (residual) acid requires 6.25ml of 0.1N NaOH for exact neutralisation. Calculate the percentage of N in the coal sample.
Chapter: [8] Fuels
What is supercritical CO2? Why is it considered a green solvent.
Chapter: [10] Green Chemistry
Write a short note on Particle reinforced composites.
Chapter: [9] Composite Materials
What is cracking? Explain in detail – fixed bed catalytic cracking.
Chapter: [8] Fuels
Write a note on heat resistant steel
Chapter: [7] Alloys
A metal rod half immersed in water starts corroding at the bottom. Give reasons.
Chapter: [7] Alloys
Calculate the percentage of atom economy for the following reaction with respect to allyl chloride. CH3-CH=CH2+Cl2 → Cl-CH2-CH=CH2+HCl
Chapter: [10] Green Chemistry
Explain how the following factors affect the rate pf corrosion
i) pH
ii) Ratio of anode to cathode areas.
iii) Position of metal in galvanic series.
Chapter: [6] Corrosion
Write a brief note on products obtained from natural materials.
Chapter: [10] Green Chemistry
Define structural composites.
Chapter: [9] Composite Materials
Define shape memory alloys and mention its applications.
Chapter: [7] Alloys
A sample of coal was found to contain the following constituents. C = 81%, O = 8%, S = 1%, H = 5%, N = 1% and Ash = 4%. Calculate the minimum weight and volume of an required for the complete combustion of 1kg of coal.
Chapter: [8] Fuels
Discuss in brief sacrificial anode method of corrosion protection.
Chapter: [7] Alloys
What is powder metallurgy? Mention any two advantages and two limitations of powder metallurgy.
Chapter: [7] Alloys
Explain with suitable equations conventional and green synthesis of carbaryl. Also mention the principle of green chemistry involved.
Chapter: [10] Green Chemistry
Mention the composition, properties and uses of Duralumin:
Chapter: [9] Composite Materials
Mention the composition, properties and uses of German silver
Chapter: [9] Composite Materials
Mention the composition, properties and uses of Gun metal
Chapter: [9] Composite Materials
Mention the advantages of composite materials
Chapter: [9] Composite Materials
Distinguish between anodic and cathodic coating
Chapter: [6] Corrosion
What is biodiesel? Discuss the method to obtain biodiesel. What are the advantages of biodiesel?
Chapter: [8] Fuels
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