mam i need to understand this chapters-MICROORGANISMS FRIEND AND FOE,SYNTHETIC FIBRES AND PLASTICS AND MATERIALS METALS AND NON METALS please explain me

Dear student.

The complete explanation of this chapter has been provided in the study material embedded with necessary animations/videos for your understanding. Please go through the videos/animations and the given examples to better understand the concept. Also, try to solve the examples on your own.

If you still have any doubts about any specific topic then do let us know.

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