Tuesday, February 2, 2016

Ch. 18. Environmental Chemistry - JEE - CBSE Class XI - Revision Problems



http://gotest.pk/chemistry-online-mcqs/environmental-chemistry-quiz-test/

http://ncert.nic.in/ncerts/l/keep514.pdf

https://www.soinc.org/sites/default/files/uploaded_files/EnvChem09AnswerKey.pdf

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