E-PolyLearning

211. Example soft base is
a. H₂O
b. HCl
c. CH₂
d. C₂H₄
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Answer: (d).C₂H₄

212. The concept of strong and weak acids and bases was given by
a. Lewis
b. Newland
c. Al-Razi
d. Pearson
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Answer: (d).Pearson