Google Doodle salutes Danish biochemist Sorensen
Did you know that pH levels were first introduced way back in 1909 to better describe the acidity or alkinity of substances.
May 29, 2018, 08:55 AM IST
Did you know that pH levels were first introduced way back in 1909 to better describe the acidity or alkinity of substances.
May 29, 2018, 08:55 AM IST