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Coal , Petroleum and Petrochemicals (part 4)| 9th science chapter 16 CGBSE | SCERT | General science | CGBSE

hello everyone , My name is Aparna Mahant.
Here I have explained chapter 16 i.e Coal ,petroleum and petrochemicals.

If you have any doubts then please ask in the comment section and if you have any suggestion for video then also please write in the comment section.

Link for part 1 https://youtu.be/OxiLxSEQBkI
Link for part 2 https://youtu.be/BQdC7Ma51Dw
Link for part 3 https://youtu.be/fD7O5Z9VZko

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