Engineering Chemistry
Mahatma Gandhi Central University, Bihar
B.Tech Computer Science & Engineering
Semester 2 Examination, 2023
Engineering Chemistry (CHEM3107)
Assessment Questions
Engineering Chemistry (CHEM3107) - 2023
SECTION – A
(MULTIPLE CHOICE QUESTIONS for 5 Marks) Attempt all questions. Each question carries 1mark.
- 1
How much percentage of salt water present in seas and oceans is:
- 2
How much percentage of sodium chloride is present in sea water?
- 3
Temporary hardness is commonly known as:
- 4
Polyester is an example of:
- 5
Conversion of Coal into Coke is known as:
SECTION – B
(Short Answer Questions- 5 Marks) Attempt ANY TWO questions out of the followings. Each question carries 2.5 Marks.
- 1
What is degree of hardness? Explain calcium carbonate equivalent and its determination with suitable examples.
- 2
What is hardness of water? Explain temporary hardness & permanent hardness with suitable examples.
- 3
Discuss the preparation, properties and uses of Bakelite?
SECTION – C
(Long Answer Questions – 10 Marks) Attempt the questions having internal choice. Each question carries 5 marks.
- 1
Answer any ONE of the following
(a)What is complexometric titrations? How can you determine the hardness of water using EDTA method? Explain the chemistry involved in the above method.
OR
(b)What are boiler problems with hard water? Explain the boiler corrosion & caustic embrittlement in detail.
- 2
Answer any ONE of the following
(a)What are the technique for water softening? Explain about the sodalime process & ion exchange process in detail.
OR
(b)Write the preparation, properties and uses of Teflon, PVC and polyurethanes?