Download GTU BE/B.Tech 2018 Winter 6th Sem New 2162604 Characterisation Of Rubber Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (NEW) EXAMINATION - WINTER 2018

Date: 30/11/2018

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Instructions:
1. Attempt all questions.

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1. (a) Write down the full forms of given terms: (i) ANSI (ii) ASTM (iii) CEN [03]
   (b) List out the chemicals which are used to carry out chloroform extraction of rubber. Also express the result of this test. [04]
2. (a) Discuss in detail about the characterization of various rubbers by following Lassaigne Sodium Fusion method. [07]
   

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   OR
   (b) How the Small Angle X-ray Scattering differs from Wide Angle X-ray Scattering? [03]
   (c) Give the advantages of Transmission Electron Microscopy over Scanning Electron Microscopy. [04]
3. (a) Explain the given features with respect to microscopy: (i) Secondary Electrons (ii) Back Scattered Electrons [07]
   OR
   

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   (b) Discuss in detail about different types of lenses used in case of Electron Microscopy. [03]
   (c) List the factors affecting the result of Thermogravimetric Analysis (TGA). [04]
4. (a) Write a short note on Temperature Modulated Differential Scanning Calorimetry (TMDSC). [07]
   OR
   (b) With suitable examples of rubber and related materials, discuss the applications of Differential Thermal Analysis. [03]
   

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   (c) How can we express the result of Thermogravimetric Analysis (TGA)? [04]
5. (a) Draw labeled diagram of Heat Flux Differential Scanning Calorimetry Apparatus. [07]
   OR
   (b) With suitable examples of rubber and related materials, discuss the applications of Dynamic Mechanical Analysis (DMA). [03]
   (c) Write in brief on classification of column chromatography. [04]

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6. (a) Write a short note on different types of stationary phase used in case of Gas Chromatography (GC). [07]
   OR
   (b) Discuss the given features with respect to chromatography: (i) Relative Retention (ii) Resolution [03]
   (c) Write in brief on classification of planner chromatography. [04]
7. (a) Write about the different types of sample injection system used in case of Gas Chromatography (GC). [07]
   

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   OR
   (b) Discuss the given features with respect to chromatography: (i) Retention Time (ii) Retention Volume [03]
   (c) Which different types of radiation sources are used in case of Infrared Spectroscopy (IR)? [04]
8. (a) Write a short note on different types of dispersing devices used in case of spectroscopy. [07]
   OR
   

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   (b) Discuss the Beer-Lambert’s law. Also give its limitations. [03]
   (c) Which different types of radiation sources are used in case of Ultraviolet Spectroscopy? [04]
9. (a) Write a brief note on monochromator. [07]
   OR
   (b) With labeled diagram, explain the construction and working of single beam spectrophotometer. [07]

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