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Arrange the following in the decreasing order of basic strength?

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IV > III > II > I

I > II > III > IV

II > I > III > II

II > III > I > IV

answer is B.

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Detailed Solution

Generally basic strength increases by E.D.G.(electron donating group) & it depend on I-effect (depends on distance)
From the above data the order of strength of basicity is IV>III>II>I

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