The decreasing order of nucleophilicities of the following is :
(I) $H_{2} O$
(II) $E t O H$
(III) $M e C O O^{⊝}$
(IV) $⊝ O H$
(V) $E t O^{⊝}$

(V) > (I V) > (I I I) > (I I) > (I)

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(I) > (I I) > (I I I) > (I V) > (V)

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(I V) > (V) > (I I I) > (I I) > (I)

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(I) > (I I) > (I I I) > (V) > (I V)

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Solution

The correct option is A $(V) > (I V) > (I I I) > (I I) > (I)$
Acidity: $H_{3} O^{⊝} > E t ⊝ O H_{2} > M e C O O H > H_{2} O > E t O H$ .
Basicity and nucleophilicity: $H_{2} O < M e O H < M e C O O^{⊝} < ⊝ O H < E t O^{⊝}$
i.e., $(V) > (I V) > (I I I) > (I I) > (I)$

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The decreasing order of nucleophilicities of the following is :(I) H2O (II) EtOH(III) MeCOO⊝ (IV) ⊝OH(V) EtO⊝

The correct option is A (V)>(IV)>(III)>(II)>(I)Acidity: H3O⊝>Et⊝OH2>MeCOOH>H2O>EtOH.Basicity and nucleophilicity: H2O<MeOH<MeCOO⊝<⊝OH<EtO⊝ i.e., (V)>(IV)>(III)>(II)>(I)

The decreasing order of nucleophilicities of the following is :
(I) $H_{2} O$
(II) $E t O H$
(III) $M e C O O^{⊝}$
(IV) $⊝ O H$
(V) $E t O^{⊝}$

The correct option is A $(V) > (I V) > (I I I) > (I I) > (I)$
Acidity: $H_{3} O^{⊝} > E t ⊝ O H_{2} > M e C O O H > H_{2} O > E t O H$ .
Basicity and nucleophilicity: $H_{2} O < M e O H < M e C O O^{⊝} < ⊝ O H < E t O^{⊝}$
i.e., $(V) > (I V) > (I I I) > (I I) > (I)$