KBC 2023| A substance is acidic if its value is less than _____. KBC 2023, Check the answer to the question- A substance is acidic if its value is less than _____. By Himani Budakoti - September 13, 2023 KBC 2023, Amitabh Bachchan. (Representative Image) KBC 2023, The options of the question – A substance is acidic if its value is less than _____. A. 7 B. 8 C. 9 D. 10 The answer is A. 7.