Engineering Chemistry
Mahatma Gandhi Central University, Bihar
B.Tech Computer Science & Engineering
Semester 2 Examination, 2024
Engineering Chemistry (CHEM3107)
Assessment Questions
Engineering Chemistry (CHEM3107) - 2024
SECTION – A
Multiple Choice Questions. Attempt all questions. Each question carries one mark.
- 1
The colour of M-EBT complex is:
- 2
The nature of phenolphthalein is:
- 3
The number of cross linking in polymeric units increases:
- 4
Bakelite is:
- 5
Tetraethyl lead is:
- 6
Pyrolysis of coal at >350°C produces:
- 7
Mechanism of polymerisation normally involves how many steps:
- 8
Silicones are polymer of which monomer:
- 9
Electrochemical corrosion is:
- 10
Liquefied petroleum gas (LPG) is the mixture of:
SECTION – B
Short Answer Questions- 20 Marks Attempt ANY FOUR questions out of the followings. Each question carries 5 Marks.
- 1
What is hardness of water? How can you determine the hardness of water using EDTA method.
- 2
What are boiler problems with hard water? Explain the scale & sludge formation & caustic embrittlement in detail.
- 3
Write the preparation, properties and uses of Teflon, Nylons and Bakelite?
- 4
Explain following with suitable examples:
(a) Calorific value
(b) Pyrolysis of coal
(c) Carbonization.
- 5
Discuss the corrosion controlling methods.
- 6
Discuss the mechanism of base catalyzed polymeration of ethylene to polyethene.
SECTION – C
Long Answer Questions – 30 Marks Attempt ALL questions having internal choices. The question carries 10 marks.
- 1
Answer any ONE of the following
(a)Explain the following with suitable examples:
(a) Calcium carbonate equivalent
(b) Priming & Foaming
(c) Boiler corrosion
OR
(b)What are rubbers? Write the synthesis and uses of following rubbers:
(a) Buna S rubber
(b) Buna N rubber
(c) Silicone rubber
(d) Butyl Rubber
- 2
Answer any ONE of the following
(a)What are gaseous fuels? Explain the preparation and use of:
(a) Water gas
(b) Producer gas
(c) Coal gas
OR
(b)Explain these:
(i) What are the composition of crude oil? Explain processing of crude oil?
(ii) Discuss the classification of coal & their uses?
(iii) Explain about Cetane number.
- 3
Answer any ONE of the following
(a)Explain these followings:
(i) Type of corrosions.
(ii) Molecular weight of polymers.
OR
(b)Explain these followings:
(i) Factors influencing corrosion.
(ii) Chemical & Electrochemical corrosion with suitable example.