Which of the following transition metal oxides is widely recognized for its strongly acidic nature a — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Chromium(VI) oxide ($CrO_3$) is a high oxidation state ($+6$) oxide, making it strictly acidic. It reacts with alkalis to yield the yellow chromate ion. $CrO$ is basic, and $Cr_2O_3$ is amphoteric.