Subject Code: 131301
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-III (OLD) EXAMINATION — WINTER 2017
Subject Name: Environmental Science-1
Date: 14/11/2017
Time: 10:30 AM to 01:00 PM
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) What do you mean by primary standard? Give examples. Write the characteristics of primary standard. [07]
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(b) Explain the generalized gas law [07]
Q.2 (a) Give the difference between distilled water & demineralised water. [07]
(b) What do you mean by hardness? What are its types? Explain the zeolite method for the removal of permanent hardness. [07]
OR
(b) What are the two types of electrodes in the pH meter? Explain the working of pHmeter. [07]
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Q.3 (a) Explain the ionization of weak acids. [07]
(b) Write a short note on the standard methods of analysis of water and wastewater. [07]
OR
(a) How will you differentiate chemical & microbiological analysis. [07]
Q.4 (a) The solubility product of AgBr at a certain temperature is 2.5 x10-13. Find out the solubility of AgBr in g/L at this temperature. [07]
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(b) Explain the instrumental method for the analysis of turbidity with the help of diagram. [07]
OR
(a) Name the different methods used for the analysis of chloride. Explain any one of them. [07]
(b) Calculate volume of oxygen required at 25°C and 0.5 atm. Pressure for combustion of 40gm of methane [07]
Q.5 (a) Define solubility product. What is its environmental significance. [07]
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(b) Write the uses of the following [07]
1. BOD bottle 2. Pipette 3. Measuring Cylinder 4. Hot air oven
5.Stack 6. Jar test apparatus 7. Condenser Monitoring kit
OR
Q.5 (a) Write the importance of caliberation of glassware and instruments. Write the basic procedure for the washing of glasswares [07]
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(b) What is alkalinity? What are its types? What is the procedure for the measurement of two types of alkalinity [07]
This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
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