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Applied Chemistry 1 CBCGS 2018-2019 BE Automobile Engineering Semester 1 (FE First Year) Question Paper Solution

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Applied Chemistry 1 [CBCGS]
Marks: 60Academic Year: 2018-2019
Date: December 2018

Questions number 1 is compulsory.

Attempt any three questions from Q.2 to Q.6  .


[15]1
[3]1.a

Explain the principle of EDTA method .

Concept: Determination of Hardness of Water by Edta Method and Problems
Chapter: [1] Water
[3]1.b

What is glass transition temperature ?Write its significance .

Concept: Effect of heat on the polymers (Glass transition temperature)
Chapter: [2] Polymers
[3]1.c

Write the significance of the following properties of lubricants.
i)Emulsification ii)Cloud point  iii)Fire point

Concept: Definition and significance of - Viscosity
Chapter: [4] Lubricants
[3]1.d

What is RCC ? What are the advantages of RCC over concrete? 

Concept: Cement - RCC and Decay
Chapter: [6.01] Cement
[3]1.e

Explain the reduced phase rule .

Concept: Reduced Phase Rule
Chapter: [5] Phase Rule
[3]1.f

Distinguish between thermoplastic and thermosetting polymer.

Concept: Thermosetting plastic
Chapter: [2] Polymers
[3]1.g

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
Chapter: [1] Water
[15]2
[6]2.a

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
Chapter: [1] Water
[5]2.b
[3]2.b.i

Write a brief note on polymers used in medical field .

Concept: Polymers in Medicine and Surgery
Chapter: [2] Polymers
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[2]2.b.ii

Name two additives added in blended oils .Give one example of each .

Concept: Additives in blended Oils
Chapter: [4] Lubricants
[4]2.c

Explain with the help of chemical reactions “ Setting and Hardening “ of cement .

Concept: Cement - Setting and Hardening of Portland Cement
Chapter: [6.01] Cement
[15]3
[6]3.a

What is fabrication of plastic ? Explain injection moulding process with a neat diagram .

Concept: Fabrication of Plastic by Injection
Chapter: [2] Polymers
[5]3.b
[3]3.b.i

Discuss the advantage and limitations of the phase rule .

Concept: Advantages and Limitations of Phase Rule.
Chapter: [5] Phase Rule
[2]3.b.ii

Differentiate between SWNT and MWNT .

Concept: Nanomaterials - properties and uses of CNTS
Chapter: [6.02] Nanomaterials
[4]3.c

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
Chapter: [1] Water
[15]4
[6]4.a

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
Chapter: [1] Water
[5]4.b
[3]4.b.i

Find the acid value of the given oil whose 20 ml required 2.8 ml of N/10 KOH during titration .( Density of oil =0.86 g/ml )

Concept: Additives in blended Oils
Chapter: [4] Lubricants
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[2]4.b.ii

Write a short note on decay of concrete .

Concept: Cement - RCC and Decay
Chapter: [6.01] Cement
[4]4.c

Natural rubber requires vulcanization .Give reasons .With appropriate reactions explain how the drawbacks are overcome.

Concept: Drawbacks of Natural Rubber
Chapter: [2] Polymers
[15]5
[6]5.a

Write preparation ,properties and uses of following polymers : i) Kevlar ii) Silicone rubber iii) Buna S

Concept: Preparation, properties and uses of Kevlar
Chapter: [2] Polymers
[5]5.b
[3]5.b.i

Explain Activated sludge method with the help of diagram

Concept: Sewage Treatment
Chapter: [1] Water
[2]5.b.ii

What is grease ? What are the conditions in which greases are used ?

Concept: Lubricants - Semisolid Lubricants
Chapter: [4] Lubricants
[4]5.c

Draw the phase diagram of one component system and find out the number of degree of freedom along the curves and areas .

Concept: One Component System (Water)
Chapter: [5] Phase Rule
[15]6
[6]6.a

What are lubricants ? Define lubrication .Explain Hydrodynamic lubrication mechanism with neat diagram .

Concept: Lubricants
Chapter: [4] Lubricants
[5]6.b
[3]6.b.i

Define 
a) Phase b) Component c) Degree of freedom

Concept: Reduced Phase Rule
Chapter: [5] Phase Rule
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[2]6.b.ii

Write a short note on Reverse Osmosis .

Concept: Drinking Water Or Municipal Water
Chapter: [1] Water
[4]6.c

Explain laser ablation method for production of CNT’s

Concept: Nanomaterials - properties and uses of CNTS
Chapter: [6.02] Nanomaterials

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