The decreasing nucleophilic order of the following compounds is:
$i . {N H}_{3}$ $i i . {P H}_{3}$ $i i i . A s H_{3}$ $i v . S b H_{3}$

(i) > (i i) > (i i i) > (i v)

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(i v) > (i i i) > (i i) > (i)

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(i i) > (i) > (i i i) > (i v)

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(i v) > (i) > (i v) > (i i i)

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Solution

The correct option is B $(i v) > (i i i) > (i i) > (i)$
Since nucleophilic centre is different and belongs to the same group, so basic character and nucleophilicity are reversed.
$S b H_{3} > A s H_{3} > {P H}_{3} > {N H}_{3}$

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Similar questions

The decreasing nucleophilic order of the following compound is:

$(i) Θ C H_{3}$

$(i i) Θ N H_{2}$

$(i i i) Θ O H$

$(i v) Θ F$

Q. Arrange the following compounds in decreasing order of their reactivity with sodium methoxide in methanol at

50^{\circ}

Mark the correct order of decreasing acid strength of the following compounds.

(a) V > IV > II > I > III
(b) II > IV > I > III > V
(c) IV > V > III > II > I
(d) V > IV > III > II > I

Order of decreasing acidity of the following is

(I) HCOOH

(II) ${C H}_{3} C O O H$

(III) ${C l}_{2} C H C O O H$

(IV) ${C F}_{3} C O O H$

Q. Arrange the following compounds in the order of decreasing tendency towards

S N_{2}

reaction.

C H_{3} C H_{2} C H_{2} C l . . . . . . . . . (i)

C H_{3} C H_{2} C H C l C H_{3} . . . . . . . (i i)

(C H_{3})_{2} C H C H_{2} C l . . . . . . . . (i i i)

(C H_{3})_{3} C - C l . . . . . . . . . . (i v)

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

The correct option is B (iv)>(iii)>(ii)>(i)Since nucleophilic centre is different and belongs to the same group, so basic character and nucleophilicity are reversed.SbH3>AsH3>PH3>NH3

The decreasing nucleophilic order of the following compounds is:
$i . {N H}_{3}$ $i i . {P H}_{3}$ $i i i . A s H_{3}$ $i v . S b H_{3}$

The correct option is B $(i v) > (i i i) > (i i) > (i)$
Since nucleophilic centre is different and belongs to the same group, so basic character and nucleophilicity are reversed.
$S b H_{3} > A s H_{3} > {P H}_{3} > {N H}_{3}$