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GyanMul Prep · NEB +2 · Science · Grade 12

Chemistry (Science, Grade 12)

Everything on these tabs is Chemistry (Science, Grade 12) only, within NEB +2 Science · Grade 12.

Chapter 19 of 21 · Chemistry (Science, Grade 12)

Paper and Pulp

8 topics
Board exam — Applied chemistry, 8 marks across 4 chapters

How a tree becomes a sheet: what pulp is and how it differs from paper, the mechanical and chemical routes to it, and the bleaching and finishing that follow.

Topics

What the syllabus defines for this chapter

1Raw materials for the production of paper
2Pulp and paper: the difference between them
3Mechanical pulping
4Chemical pulping: the sulphite, sulphate (kraft) and soda processes
5Bleaching of pulp
6Manufacture of paper from pulp; sizing, filling and calendering
7Recycling of paper
8Environmental problems of the paper industry and their control

GyanMul Prep · NEB +2 · Science · Grade 12

Chemistry (Science, Grade 12)

Everything on these tabs is Chemistry (Science, Grade 12) only, within NEB +2 Science · Grade 12.

Science · Grade 12 subjects

Chapter 19 of 21 · Chemistry (Science, Grade 12)

Paper and Pulp

8 topics
Board exam — Applied chemistry, 8 marks across 4 chapters

How a tree becomes a sheet: what pulp is and how it differs from paper, the mechanical and chemical routes to it, and the bleaching and finishing that follow.

Topics

What the syllabus defines for this chapter

1Raw materials for the production of paper
2Pulp and paper: the difference between them
3Mechanical pulping
4Chemical pulping: the sulphite, sulphate (kraft) and soda processes
5Bleaching of pulp
6Manufacture of paper from pulp; sizing, filling and calendering
7Recycling of paper
8Environmental problems of the paper industry and their control