# (a)  Tripositive and tetrapositive ions are rare when compared to dipositive an unipositive ions. ​

Dear student

Yes, tripositive and tetrapositive ions are rare when compared to dipositive and unipositive ions.
Unipositive ions are those which have a unit positive charge, for ex , Na+
Dipositive ions are those which have two units of positive charge , for ex, Mg2+

Tripositive and tetrapositive ions are  obtained by the removal of three electrons and four electrons respectively from the neutral atom.So in order to obtain these ions, a very high ionisation energy is required. Such high ionisation energy is not available in most of the chemical reactions. Hence the formation of these ions is very rare.

Regards

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