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Select all of the statements that correctly describe an amphoteric molecule or ion.
It can act as either a base or an acid.
It contains at least one hydrogen atom.
It can undergo either an acid-base reaction or an oxidation-reduction reaction.
It contains at least one chlorine atom.
It contains at least one lone pair of electrons.
It can act as either a base or an acid.
It contains at least one hydrogen atom.
It contains at least one lone pair of electrons.

Answer :

The correct statements about amphoteric molecule or ion are: It can act as either a base or an acid.

It contains at least one hydrogen atom.

It contains at least one lone pair of electrons.

What is an amphoteric molecule or ion?

An amphoteric (or amphiprotic) molecule is one that can function as both an acid and a base. Glycine is an example of an amphoteric amino acid. Base is the amino group (it can accept a proton).

Hydrogen ions can be repeatedly removed from an acid or repeatedly added to a base to reveal amphoteric compounds. Since NO2 is not an acid and does not contain any extra hydrogen ions, much alone extra hydrogen ions that cannot be eliminated, it is not amphoteric.

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