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📏PH scale (in Hindi)
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All about ph scale

Unacademy user
thanks sir ji for me u r a lighthouse showed me the right path to prepare following u since ur strategy lessons for 2019 not missed a single lesson gives me a great satisfaction towards my preparation all thanks to u . u made me consistent in study really excited for August month thanks for everything thing sir ji u rock
Nice explanation... Your every video is useful, important and helpful for the exam. Thanks for the video.

  1. 14

  2. (i) (iii) . grd V1 Vi1

  3. 37 37