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Arrange the following in decreasing order of basic strength: (A) C6H5CH2NH2 (B) C6H5N(CH3)2 (C) C6H5NHCH3 (D) C6H5NH2

1. (A) > (B) > (C) > (D)
2. (B) > (A) > (C) > (D)
3. (C) > (B) > (A) > (D)
4. (D) > (C) > (B) > (A)

Correct answer: (A) > (B) > (C) > (D)

Solution

The order of basic strength is determined by the electron-donating ability of substituents on the nitrogen atom. In this case, the alkyl group in (A) enhances basicity more than the other groups in (B), (C), and (D), leading to the arrangement (A) > (B) > (C) > (D).

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