BE Production Engineering Semester 2 (FE First Year)University of Mumbai
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Applied Chemistry 2 CBCGS 2017-2018 BE Production Engineering Semester 2 (FE First Year) Question Paper Solution

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Applied Chemistry 2
CBCGS
2017-2018 December
Marks: 60

1.Question.No. 1 is compulsory.

2.  Attempt any three question out of remaining five.


[15]1 | Answer any five from the following
[3]1.a

Select the compound which possesses highest octane number and highest cetanenumber out of n-heptane, n-octane and isooctane. 

Concept: Types of Cracking - Catalytic Cracking
Chapter: [8] Fuels
[3]1.b

Iron does not rust even if the zinc coating is broken in a galvanized iron pipe.Give reasons. 

Concept: Cathodic Protection Impressed Current Method
Chapter: [6] Corrosion
[3]1.c

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. 

Concept: Types of Corrosion - Dry Or Chemical Corrosion Due to Other Gases
Chapter: [6] Corrosion
[3]1.d

What are drawbacks of plain carbon steel 

Concept: Plain Carbon Steel
Chapter: [7] Alloys
[3]1.e

Explain the principle ‘Prevention of waste’ in green chemistry. 

Concept: Green Chemistry
Chapter: [10] Green Chemistry
[3]1.f

Define and classify composite materials. 

Concept: Classification of Composite Materials
Chapter: [9] Composite Materials
[3]1.g

Mention three functions of thinner in paint. 

Concept: Organic Coatings
Chapter: [6] Corrosion
[15]2
[6]2.a

Define corrosion of metals. Explain the electrochemical theory of wet corrosion, giving its mechanism. 

Concept: Types of Corrosion - Wet Or Electrochemical Corrosion- Mechanism Evolution of Hydrogen Type
Chapter: [6] Corrosion
[5]2.b
[3]2.b.1

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. 

Concept: Solid Fuels
Chapter: [8] Fuels
[2]2.b.2

What is supercritical CO2? Why is it considered a green solvent.  

Concept: Green Solvents
Chapter: [10] Green Chemistry
[4]2.c

Write a short note on Particle reinforced composites. 

Concept: Classification of Composite Materials - Particle - Reinforced Composites
Chapter: [9] Composite Materials
[15]3
[6]3.a

What is cracking? Explain in detail – fixed bed catalytic cracking. 

Concept: Types of Cracking - Catalytic Cracking
Chapter: [8] Fuels
[5]3.b
[3]3.b.1

Write a note on heat resistant steel 

Concept: Heat Resisting Steels
Chapter: [7] Alloys
[2]3.b.2

A metal rod half immersed in water starts corroding at the bottom. Give reasons. 

 

Concept: Powder Metallurgy - Methods of Powder Metal Formation
Chapter: [7] Alloys
[4]3.c

Calculate the percentage of atom economy for the following reaction with respect to allyl chloride. CH3-CH=CH2+Cl2 → Cl-CH2-CH=CH2+HCl   

Concept: Numerical on Atom Economy
Chapter: [10] Green Chemistry
[15]4
[6]4.a

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.

Concept: Factors Affecting the Rate of Corrosion Influence of Ph
Chapter: [6] Corrosion
[5]4.b
[3]4.b.1

Write a brief note on products obtained from natural materials. 

Concept: Products from Natural Materials
Chapter: [10] Green Chemistry
[2]4.b.2

Define structural composites. 

Concept: Classification of Composite Materials - Structural Composites
Chapter: [9] Composite Materials
[4]4.c

Define shape memory alloys and mention its applications. 

Concept: Shape Memory Alloys
Chapter: [7] Alloys
[15]5
[6]5.a

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.

Concept: Solid Fuels
Chapter: [8] Fuels
[5]5.b
[3]5.b.1

Discuss in brief sacrificial anode method of corrosion protection. 

Concept: Purpose of Making Alloys
Chapter: [7] Alloys
[2]5.b.2

What is powder metallurgy? Mention any two advantages and two limitations of powder metallurgy. 

Concept: Powder Metallurgy - Applications of Powder Metallurgy
Chapter: [7] Alloys
[4]5.c

Explain with suitable equations conventional and green synthesis of carbaryl. Also mention the principle of green chemistry involved. 

Concept: Conventional and Green Synthesis of Carbaryl
Chapter: [10] Green Chemistry
[15]6
[6]6.a
[2]6.a.1

Mention the composition, properties and uses of Duralumin: 

Concept: Composite Materials - Characteristic properties of composite materials
Chapter: [9] Composite Materials
[2]6.a.2

Mention the composition, properties and uses of German silver

Concept: Composite Materials - Characteristic properties of composite materials
Chapter: [9] Composite Materials
[2]6.a.3

Mention the composition, properties and uses of Gun metal 

Concept: Composite Materials - Characteristic properties of composite materials
Chapter: [9] Composite Materials
[5]6.b
[3]6.b.1

Mention the advantages of composite materials 

Concept: Composite Materials
Chapter: [9] Composite Materials
[2]6.b.2

Distinguish between anodic and cathodic coating 

Concept: Factors Affecting the Rate of Corrosion Relative Area of Anodic and Cathodic Parts
Chapter: [6] Corrosion
[4]6.c

What is biodiesel? Discuss the method to obtain biodiesel. What are the advantages of biodiesel? 

Concept: Biodiesel
Chapter: [8] Fuels

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