American Journal of Chemical Engineering. American Journal of Applied Chemistry. International Journal of Computational and Theoretical Chemistry. Chemical and Biomolecular Engineering.
Biochemistry and Molecular Biology. International Journal of Environmental Chemistry.
Journal of Chemical, Environmental and Biological Engineering. International Journal of Atmospheric and Oceanic Sciences.
American Journal of Polymer Science and Technology. Journal of Drug Design and Medicinal Chemistry. International Journal of Pharmacy and Chemistry.
American Journal of Heterocyclic Chemistry. American Journal of Chemical and Biochemical Engineering. International Journal of Systems Engineering. Industrial Engineering.
World Journal of Food Science and Technology. Colloid and Surface Science. Petroleum Science and Engineering. International Journal dissertation background problem Bioorganic Chemistry.
International Journal of Photochemistry and Photobiology. ISSN Print: ISSN Online: Latest Articles. PDF KB. Fruit Juice. A Comparative Study with Spectrophotometric Method.
A Review on Heterocyclic: A verifcation code has been sent to your mobile number. English Hindi All. Anjum Khan Feb 21, The year-wise question papers for Class 12 th Chemistry subject have been provided in the table below — CBSE Class 12 th Chemistry Previous Year Question Papers with solutions — Year Question Paper Download here Download here Download here Download here Download here Download here Download here Before appearing for the examination, students need to get an overview of the test pattern, so that they can adopt a strategy for their exam preparation.
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The first place paper is seen in history is in China around AD.
It reached Japan in AD where they began making it in mass portions. Both the Chinese and Japanese made their paper from the inner bark of the mulberry tree.
Once word spread to East Asia, the paper making process was being perfected. Arabians used screens papers of chemistry of reeds throughout the pulping process which, in turn, produced better paper.
History reveals the first export of paper to Europe in the 14th century papers of chemistry just like the Arabians, the Italians introduced multiple steps in the improvement of paper like having the paper pressed and drying the paper on ropes.