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https://www.aspirationsinstitute.com/wp-content/uploads/2020/10/CBSE-Class-12-Chem-Notes-Question-Bank-Aldehydes-Ketones-And-Carboxylic-Acids-PDF.pdf

https://www.aspirationsinstitute.com/wp-content/uploads/2020/10/CBSE-Class-12-Chem-Notes-Question-Bank-Aldehydes-Ketones-And-Carboxylic-Acids-PDF.pdf