Mathematics: Easy Trick for multiplying 2-digit numbers You must be knowing the normal trick of multiplication which your teachers taught you. It goes like this: Ex: 37×77 4 4 ...
Ø The concept of pH was first introduced by the Danish chemist Søren Peder Lauritz Sørensen at the Carlsberg Laboratory in 1909 . Ø pH was originally acronym for French clause " pouvoir hydrogène ," which can be translated into the English as "power of hydrogen," or "potential of hydrogen." Ø pH is used to quantify acidic or alkaline nature of a chemical which is measured in terms of H+ ions concentration.
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