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Roll No.: …………………… Total No. of Pages:
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B. Tech. I SemesterEnd-Term Examination, January-2025
Branch:
1FY2-03 : Engineering Chemistry
Model paper
Time: 3 Hours Maximum Marks: 100
Instructions to Candidates:
The question paper is divided in three parts A, B & C.
(i) Part-A:5 Basics/Fundamentals related questions (without choice).
(ii) Part-B: 5 Analytical/Numerical questions (with internal choice i.e. attempt one question
either A or B from each question).
(iii) Part-C:5 Descriptive/Analytical/Problem Solving/Design questions (attempt any 3 out of
5).
Schematic diagrams must be shown wherever necessary. Any data you feel missing may suitably
be assumed and stated clearly. Units of quantities used/calculated must be stated clearly.
Use of following supporting material is permitted during examination:
1. Nil2. Nil
BT
PART-A
Level
(Basics/Fundamentals related questions) Max. Course
(L1
All questions are compulsory Marks Outcome
to
L6)
Q.1 a What is co polymerization ?Give example of such reaction [3] [CO1] [1]
Q.1 b What is hardness and its types [3] [CO2] [2]
Q.1 c What is pilling bedworth rule? [3] [CO3] [2]
Q.1 d Define a fuel cell. [3] [CO4] [2]
Q.1 e What is the role of gypsum? [3] [CO5] [1]
PART-B
(Analytical/Numericalquestions)
UNIT-I
Q.6 (A) Define polymers? Classify them into different types and explain each type [4+4] [CO1] [3]
briefly.
(ii) What are synthetic rubbers? Discuss the preparation, properties, and
applications of SBR and Buna-N.
Q.6 (B) What are thermoplastics and thermosets? Explain the [4+4] [CO1] [3]
differences between the two, providing suitable examples.
UNIT-II
Page 1 of 3
Q.7 (A) Calculate the amount of lime and soda needed to soft 106 litre of [8] [CO2] [3]
water containing and % purity of lime and soda is 100%
Ca (HCO3)2 = 22.4 mg/l
MgCl2 =49.0 mg/l
MgSO4=44.4 mg/l
CaSO4 =47.2 mg/l
OR
Q.7 (B) (i) What is water softening? Describe the zeolite process for water [8] [CO2] [2]
softening.
(ii) Calculate the total, permanent, and temporary hardness based on
the following observations: (i) A standard hard water solution was
prepared by dissolving 1.0 g of CaCO3 in 1 L of distilled water. From
this solution, 100 ml required 90 ml of EDTA for titration. (ii) A 100 ml
sample of the given hard water consumed 40 mL of the EDTA solution.
(iii) The boiled sample of hard water consumed 20 ml of the EDTA
solution.
UNIT-III
Q.8 (A) What is the metal coating protection of metallic surfaces? Explain [8] [CO3] [2]
giving the example of tinning or galvanizing with the help of diagram.
OR
Q.8 (B) What is dry corrosion? Explain types of oxides formed. [8] [CO3] [2]
UNIT-IV
Q.9 (A) i) Explain the concept of the electromotive force (EMF) of a [8] [CO4] [3]
cell. How is it related to the free energy change in a chemical
reaction? (ii) Describe the construction and working principle
of the calomel electrode. What are its applications in
electrochemistry?
OR
Q.9 (B) (i) Describe the construction and working of lithium-ion batteries. [8] [CO4] [3]
What are their advantages and applications compared to other
types of batteries?
(ii) Discuss the concept of standard electrode potential and derive
the Nernst equation, highlighting its significance.
UNIT-V
Q.10 (A) (ii) Summarize the importance of lubricants in daily life. How do [8] [CO5] [3]
they benefit machines and vehicles? (3 marks)
(iii) Define flash point and fire point. Why are these properties
important for lubricants? (3 marks)
OR
Q.10 (B) (i) Explain setting and hardening of Portland cement. What is the role [8] [CO5] [3]
of gypsum during setting of cement?
PART-C
(Descriptive/Analytical/Problem Solving/Design questions)
(Attempt any 3 out of 5) (Q.11 to Q.15)
UNIT-I
Page 2 of 3
Q.11 (i)What is nylon? Discuss its preparation, properties, and [5*3] [CO1] [3]
applications in everyday life.
(ii) What is vulcanization? Explain the process and its importance in
the production of rubber.
(iv) Write short note on bakellite and synthetic rubber
UNIT-II
Q.12 (i)What is hardness of water? Explain determination of [5*3] [CO2] [3]
hardness by EDTA method
(ii) Write a brief note on breakpoint chlorination and its
benefits for disinfection of water by municipalities.
(iii) What is reverse osmosis (RO)? Explain the basic
principle behind the process.
UNIT-III
Q.13 Explain the mechanism of electrochemical/Wet corrosion in detail both [15] [CO3] [2]
by hydrogen evolution and oxygen absorption with the help of diagram.
UNIT-IV
Q.14 (i) Describe the construction and working of lithium-ion [7+8] [CO4] [2]
batteries. What are their advantages and applications compared
to other types of batteries?
(ii) Discuss the concept of standard electrode potential and
derive the Nernst equation, highlighting its significance.
UNIT-V
Q.15 (i) What is Cement? Describe manufacturing of Portland [10+5] [CO5] [2]
cement by Rotary kiln process with chemical reactions
(ii) What are lubricants? Classify them based on their types and
explain each category briefly
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