The decreasing nucleophilic order of the following compounds is:i. NH3 ii. PH3 iii. AsH3 iv. SbH3

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(i) > (ii) > (iii) > (iv)

(iv) > (iii) > (ii) > (i)

(ii) > (i) > (iii) > (iv)

(ii) > (i) > (iv) > (iii)

answer is B.

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Detailed Solution

Since nucleophilic centre is different and belongs to the same group, so basic character and nucleophilicity are reversed.SbH3>AsH3>PH3>NH3

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