How Much Amount is Sprayed Solution of Phenolphthalein

How Much Amount is Sprayed Solution of Phenolphthalein on Concrete.

A) 0.1%
B) 0.2%
C) 0.25%
D) 0.15%

ANSWER= (B) 0.2%
Explain:- Correct answer for question How much amount is sprayed solution of phenolphthalein on concrete is (B) 0.2%
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