Download GTU BE/B.Tech 2019 Summer 3rd Sem New 2131301 Environmental Sciences I Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (NEW) EXAMINATION — SUMMER 2019

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Subject Code: 2131301 Date: 04/06/2019
Subject Name: Environmental Sciences I
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) List out the glassware used in the Environmental Laboratory. 03
(b) Write down the method of the preparation of the Distilled water. 04

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(c) Balance the following Equation: 07
K₂Cr₂O₇ + KI+ H₂SO₄ = Cr₂(SO₄)₃ + K₂SO₄ + I₂ + H₂O

Q.2 (a) Why is it required to calibrate the instrument used for the Analysis? 03
(b) Explain about the different types of Error. 04
(c) Explain generalized Gas law and derive the Equation as well as Unit of 07

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the Universal gas constant.

OR

(c) Write a note on “Dispersion and Scattering methods of analysis.” 07

Q.3 (a) Explain about Drying. 03
(b) Determine the weight required for prepare the following solutions: (a) 04

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300 ml 0.5 N Potassium sulfite (b) 600 ml 0.6 N Aluminum sulfate
(c) Write a note on “Volumetric Analysis.” 07

OR

Q.3 (a) Explain about Precipitation. 03
(b) Determine the weight required for prepare the following solutions: (a) 04

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750 ml 0.1 M CaCl₂ (d) 250 ml 0.25 M MgSO₄
(c) Enlist Emission methods for the analysis. Explain any one in detail. 07

Q.4 (a) Explain the types of bond. 03
(b) Write the process for standardization of solution with Primary Standard. 04
(c) Enlist the different types of Electrode. Explain any one in detail. 07

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OR

Q.4 (a) Explain about the selection of the proper Normality. 03
(b) Enlist and explain different types of Sampling procedure. 04
(c) Explain standard methods for the determination of Phenolphthalein and 07
Methyl Orange Alkalinity in water.

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Q.5 (a) Differentiate between Molarity and Normality. 03
(b) Write note on “Standard methods for analysis of water and waste water.” 04
(c) Explain standard methods for the determination of sulfates in water. 07

OR

Q.5 (a) Differentiate between Molarity and Molality. 03

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(b) Explain the different types of solid present in the water. 04
(c) Explain standard methods for the determination of Chloride in water. 07

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