Download SGBAU B-Tech 4th Sem Paper Technology I Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 4th Sem Paper Technology I Previous Question Paper

B.'l?ech. Fourth Semester (Food. Pulp & Paper. Oil & Paint & Petro Chem.) (CGS)
11017 : Pulp & Paper Technology-l
4 PT 02
P. Pa yes : 2 - 3
MEWS mummy!!! Mmm?o
Notes : 1. Due credit will be given to neatncss and adequate dimensions.
2. Assume suitable data wherever necessary.
3. Diagrams and chemical equations should be given wherever necessary.
4. Illustrate your answer necessary with the help ot'neat sketches.
5. Discuss the reaction, mechanism wherever necessary.
SECTION - A
1 a) W hat do you understand by the term springwood and summer wood '.? 5
b) Explain the ?ber properties of using hemp as a paper making raw material. 4
c) What do you understand by bark ? Write doym the structure of bark. 5
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2. :1) Why do you analyse the moisture content of wood '2 5
b) Explain the ?ber properties and end usage of bamboo as a paper making raw material. 5
e) W hen you analyse the growth rings in tree. What inferences would you conclude ?3 4
3. a) In a tabular form, write down the various softwood cell types which you would observe. 4
b) Explain the cell derision and cell enlargement phase during wood formation. 5
c) W hen you study physical properties of ?bers, what do you understand by Runkel ratio and 4
Muhlethaler ratio ?.?
OR
4. a) In a tabular form write down the chemical composition of wood. 5
b) - In detail ym'te down the structure and composition of ray cells in gymnospenns. 5
c) What do you understand by aspect ratio ol?pulp ?bers ? What is it's use '3 3
5 a) How Muhlcthaler model explain the ambiguity of crystalline and amorphous cellulose '? 5-
b) Explain with the help of chemical reaction the alkaline degradation of cellulose. 6
c) Draw the chemical structure of cellotriose. 2
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AW - 3077 y l P.T.O

b)
C)
b)
C)
10. a)
b)
11. a)
b)
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12. a)
b)
AW - 3077
Write down the structure and dimension: of micro?brils found in different plants.
Il?you want to measure the viicmily ml cellulose then in which chemical would you
dissolve it ?9 Write tlovm it's Chemlt?il: name and it's chemical structure.
How would you isolate cellulose from wood ? Write down the various methods of
cellulose isolation.
SECTION - B
Write down the structure ofhardxsood hcmicellulose observed in tree.
Draw the chemical formula ol?conindrin found in spruce and hemlock trees.
What do you understand by diterpcnc?ids found in hcanwood ot?tree ?.?
OR
Explain the various lritcrpemids found in tree and it's chemical Composition.
Draw the chemical structure ol'soltwood xylon and explain it's chemical propenies.
Whict type of hemicellulosc CXCltl\l\ cl} found in hardwood is water soluble ??
Write down in a tabular form the various methods of isolation of lignin. Also discuss the
advantages and disadvantages of cacl'.
Explain lignin carbohydrate bonds
Draw the chemical structure 01' puruwumaryl alcohol.
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Explain biosynthesis of lignin precursors: also draw the chemical reactions taking place.
With the help ofchemical reaction. explain the solubilization of lignin in an acid catalyzed
systcn' from wood.
While analyzing lignin in a quantitative mcthod what are the drawbacks of Klasson's
method '.? How would you overcome it.
Explain how lignin can be used as 21 mm material to generate energy
With the help ofchcmical equation, explain lignin degradation with thioacetic acid.
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How would you manufacture mercuptan from lignin ?? Where would you use it ?L?
Explain the use ofligm'n a5 a binder.
Explain microbial degmdatimz ot?lign n.
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