Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 3rd Sem Old 131301 Environmental Science 1 Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (OLD) EXAMINATION ? WINTER 2017
Subject Code:131301 Date:14/11/2017
Subject Name: Environmental Science-1
Time: 10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. 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
(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
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
Q.3 (a) How will you differentiate chemical & microbiological analysis. 07
(b) 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
Q.4 (a) Explain the instrumental method for the analysis of turbidity with the help of
diagram.
07
(b) Name the different methods used for the analysis of chloride. Explain any one
of them.
07
OR
Q.4 (a) Calculate volume of oxygen required at 25?C and 0.5 atm. Pressure for
combustion of 40gm of methane
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (OLD) EXAMINATION ? WINTER 2017
Subject Code:131301 Date:14/11/2017
Subject Name: Environmental Science-1
Time: 10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. 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
(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
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
Q.3 (a) How will you differentiate chemical & microbiological analysis. 07
(b) 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
Q.4 (a) Explain the instrumental method for the analysis of turbidity with the help of
diagram.
07
(b) Name the different methods used for the analysis of chloride. Explain any one
of them.
07
OR
Q.4 (a) Calculate volume of oxygen required at 25?C and 0.5 atm. Pressure for
combustion of 40gm of methane
07
2
(b) Differentiate between primary & secondary solutions. Write the procedure for
the standardization of 0.25N FAS.
07
Q.5 (a) Define solubility product. What is its environmental significance. 07
(b) Write the uses of the following
1. BOD bottle 2. Pipette 3. Measuring
Cylinder
4. Hot air oven
5.Stack
Monitoring kit
6. Jar test
apparatus
7. Condenser
07
OR
Q.5 (a) Write the importance of caliberation of glassware and instruments. Write the
basic procedure for the washing of glasswares
07
(b) What is alkalinity? What are its types? What is the procedure for the
measurement of two types of alkalinity
07
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This post was last modified on 20 February 2020