Download GTU BE/B.Tech 2019 Winter 4th Sem New 2141302 Environmental Sciences Ii Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 4th Sem New 2141302 Environmental Sciences Ii Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? IV (New) EXAMINATION ? WINTER 2019
Subject Code: 2141302 Date: 13/12/2019

Subject Name: Environmental Sciences II

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.



Marks

Q.1 (a) Define: Sol, emulsion, tyndall effect 3

(b) Enlist the mechanisms by which colloids can be coagulated. 4
(c) Explain Aliphatic and Aromatic compounds with examples. 7



Q.2 (a) State Schulze-Hardy rule. 3

(b)
The solubility of BaCO3 is 5.9 x 10-5 M at 25?C. Calculate the solubility
product i.e. Ksp.
4
(c) Explain Ionization of weak acids with examples. 7


OR
(c) Write a short note on binary mixtures. 7
Q.3 (a) Explicate the basic differences between BOD and COD 3
(b) Define Colloids. Explain surface charge of colloids. 4
(c) Write a short note: Classes of amino acids 7


OR
Q.3 (a) Explain in brief TOC. 3
(b) Explain solubility product with appropriate examples. 4
(c) Explain the biochemistry of (i) Carbohydrates (ii) Proteins 7
Q.4
(a) What are the factors affecting solubility of oxygen in water. 3

(b)
What is common ion effect? Give its application in waste water
treatment with examples
4

(c)
Explain modified Winkler Method with Chemical Reaction for DO
determination.
7


OR
Q.4 (a) How dilution water is prepared in laboratory for BOD? 3
(b) Why organic matter removal is important for wastewater treatment? 4

(c) How will you determine Oil and Grease in laboratory? 7
Q.5 (a) Differentiate: physical adsorption and chemisorption 3
(b) Write brief note biological properties of pesticides. 4

(c)
Describe in brief the methods used for the determination of volatile acids.
Explain applications of volatile acids data.
7


OR
Q.5 (a) Explain working principle of COD determination with examples. 3

(b)
Define with suitable examples: Primary alcohol (ii) Secondary alcohol
(iii) tertiary alcohol
4

(c)
Explain the chemistry involved in Argentometric method for
determination of chloride with pH consideration.
7
***************
FirstRanker.com - FirstRanker's Choice