Multiple choice general knowledge What is the chemical name of PbSO3 ? Lead tri-oxide Tri-Sulphate lead Lead sulpahte Lead(II) sulfite Reveal answer Fill a bubble to check yourself D Correct answer Explanation PbSO3 is Lead(II) sulfite - Pb is Lead, SO3 is the sulfite ion (not sulfate), and the +2 charge balances with the sulfite ion. Options A, B, and C are incorrect - option C contains a typo (sulpahte).