Which statement is correct ?

Engineering

Chemistry

Electrophile and Nucleophile

Question

${Na}^{\oplus} and \overset{\oplus}{N} O_{2}$ both are electrophile.

$Me - O^{⊝} < Me - {CH}_{2} - O^{⊝} < {Me}_{2} CH - O^{⊝} < {Me}_{3} C - O^{⊝}$ (Nucleophilicity order)

${SH}^{⊝}$ is better nucleophile than ${Cl}^{⊝}$ in DMSO

$I^{⊝}$ is better nucleophile than $F^{⊝}$ in H₂O

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${Na}^{\oplus}$ is not an electrophile
Correct nucleophilicity order is $Me - O^{⊝} > Me - {CH}_{2} - O^{⊝} > {Me}_{2} CH - O^{⊝} > {Me}_{3} C - O^{⊝}$ Order is as per steric hindrance
Due to lesser electronegtaivity of S as compared to Cl.
Due to greater solvation of smaller $F^{⊝} than I^{⊝}$ than in H₂O.