Which of the following are nucleophiles?

P H_{3}

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F^{⊖}

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P h_{3} S^{⊖}

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H_{2} O

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Solution

The correct options are
A $P H_{3}$
B $P h_{3} S^{⊖}$
C $F^{⊖}$
D $H_{2} O$
All the four species are nucleophiles as they contain either lone pairs or lone pairs and negative charge which can be easily donated to the suitable electrolyte.
(A) Phosphine contains lone pair of electrons on P atom,
(B) $F^{⊖}$ contains a negative charge and three lone pairs of electrons
(C) $P h_{3} S^{⊖}$ contains a negative charge and lob pair of electrons.
(D) $H_{2} ¨ O :$ contains two lone pairs of electrons.

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B + N a O H \to 2 N a_{3} B O_{3} + H_{2}

P_{4} + N a O H + H_{2} O \to N a H_{2} P O_{2} + P H_{3}

S + N a O H \to N a_{2} S_{2} O_{3} + N a_{2} S + H_{2} O

The order of boiling point of $N H_{3}, H_{2} O, H F a n d P H_{3}$ is

P + N a O H + H_{2} O \to N a H_{2} P O_{2} + P H_{3}

1. S b H_{3} > N H_{3} > A s H_{3} > P H_{3}

2. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

3. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

4. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

H_{2} O

P H_{3} + O_{2} \to P_{2} O_{5} + H_{2} O

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