Which of the following is the weakest base?Select answer from the options belowphenoxide  bromide  amide  (NH2-)methoxide

The weakest base among the options given is bromide.

Here's why:

1. Phenoxide (C6H5O-) and methoxide (CH3O-) are both strong bases because they are alkoxide ions, which are the conjugate bases of alcohols. They have a negative charge on oxygen, which is a highly electronegative atom, making these ions very reactive and strong bases.

2. Amide (NH2-) is a moderately strong base. It has a negative charge on nitrogen, which is less electronegative than oxygen, making it less reactive than phenoxide or methoxide.

3. Bromide (Br-) is the weakest base among the options. It is the conjugate base of a strong acid (HBr), and the conjugate bases of strong acids are weak bases. Bromide ion is a large, stable ion with a full octet of electrons, making it less reactive and a weak base.