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Applied Chemistry 1 CBCGS 2017-2018 BE Electronics Engineering Semester 1 (FE First Year) Question Paper Solution

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Applied Chemistry 1 [CBCGS]
Marks: 60Academic Year: 2017-2018
Date: June 2018

1) Question no .1 is compulsory

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


[15]1
[3]1.A

Discuss the drawback of natural rubber.

Concept: Drawbacks of Natural Rubber
Chapter: [2] Polymers
[3]1.B

Discuss the treatment of water using bleaching powder

Concept: Drinking Water Or Municipal Water
Chapter: [1] Water
[3]1.C

What are the limitations of Phase rule?

Concept: Advantages and Limitations of Phase Rule.
Chapter: [5] Phase Rule
[3]1.D

Discuss fullerenes. Give its applications. 

Concept: Nanomaterials - Fullerene - properties and uses
Chapter: [6.02] Nanomaterials
[3]1.E

Write a note on Greases. 

Concept: Lubricants - Semisolid Lubricants
Chapter: [4] Lubricants
[3]1.F

A 1Oml of sample of water was refluxed with 20ml potassium dichromate solution and after refluxing the excess unreacted dichromate required 26.2ml of 0. 1M FAS solution. A blank 1Oml of distilled water on refluxing with 20ml of dichromate solution required 36ml of 0. 1M FAS solution. Calculate the COD of waste water . 

Concept: COD- Definition and Significance
Chapter: [1] Water
[3]1.G

Discuss the role of polymer in medicine and surgery.

Concept: Polymers in Medicine and Surgery
Chapter: [2] Polymers
[15]2
[6]2.A

Calculate the amount of lime (85% pure) and soda (95% pure) required to soften one million litre of water which contains CaCO3 = 12. 5ppml MgCO3 = 8.4ppml
CaCl2 = 22.2ppml ,  MgCl2 = 9.5ppml C02 = 33ppml HCI = Z3ppml  organic matter= 16.Bppm 

Concept: Softening of water by Hot and Cold lime Soda method and numerical problems
Chapter: [1] Water
[5]2.B
[3]2.B.i

Give the preparations, properties and uses of Kevlar. 

Concept: Preparation, properties and uses of Kevlar
Chapter: [2] Polymers
[2]2.B.ii

Define Cloud point and Pour point of a lubricant.

Concept: Definition and significance of - Viscosity
Chapter: [4] Lubricants
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[4]2.C

Write a note on decay of concrete. 

Concept: Cement - RCC and Decay
Chapter: [6.01] Cement
[15]3
[6]3.A

Define Moulding. List the different techniques of moulding. Explain injection moulding with the help of neat diagram.

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

Explain the term 'phase' with appropriate examples.

Concept: Terms involved with examples of phase rule
Chapter: [5] Phase Rule
[2]3.B.ii

Discuss the role of gypsum during the manufacturing of Ponland cement.

Concept: Cement - Manufacture of Portland Cement
Chapter: [6.01] Cement
[4]3.C

Calculate the total hardness in ppm in given water sample.
: 50ml of standard hard water , containing 1mg pure CaCO3 per ml consumed 20ml EDTA solution.
: 50ml of water sample consumed 30ml EDTA solution using EBT indicator.

Concept: Hardness of Water
Chapter: [1] Water
[15]4
[6]4.A

Explain the zeolite method for softening of water giving suitable diagram and reactions. What are the limitations of this method. 

Concept: Zeolite process and numerical problems
Chapter: [1] Water
[5]4.B
[3]4.B.i

6gms of oil was saponified with 50ml of 0.5N alcoholic KOH solution. After refluxing for 2 hours the mixture was titrated with 25ml O.SN HCL Rnd the sponification value of Oil .

Concept: Saponification value and numerical problems
Chapter: [4] Lubricants
[2]4.B.ii

Distinguish between the wet and dry process for manufacturing of Portland cement .

Concept: Cement - Manufacture of Portland Cement
Chapter: [6.01] Cement
[4]4.C

Discuss the following additives in compounding of plastics

(a) Fillers (b) Plasticizers.

Concept: Compounding of Plastic
Chapter: [2] Polymers
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[15]5
[6]5.A | Write note on (any two):-
[3]5.A.i

Giass transition temperature 

Concept: Effect of heat on the polymers (Glass transition temperature)
Chapter: [2] Polymers
[3]5.A.ii

BUNA-S

Concept: Rubbers - Properties and Uses of Buna‐S
Chapter: [2] Polymers
[3]5.A.iii

Vulcanisation

Concept: Rubbers - Compounding of Rubber (Vulcanization of Rubber)
Chapter: [2] Polymers
[5]5.B
[3]5.B.i

Distinguish between BOD and COD. 

Concept: Bod - Definition and Significance
Chapter: [1] Water
[2]5.B.ii

Define Oiliness. What is its significance {

Concept: Definition and significance of - Viscosity
Chapter: [4] Lubricants
[4]5.C

Discuss the application of Phase rule to the one component system based on: Diagram ,  triple point

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

Define lubricants and lubrication. Mention the various mechanisms involved in lubrication of machine. Discuss boundary lubrication.

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

What is reduced or condensed phase rule.

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

Explain reverse osmosis

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

What are carbon nanotubes. what are its types. Discuss the laser method for its production. 

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

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