Question

The oxides, $Cr{O}_3,Mo{O}_3$ and $W{O}_3$ are strongly

• A. neutral
• B. acidic
• C. basic
• D. None of these

Answer 1

Answer: (B)

Chromium, molybdenum and tungsten are transition element. They are present in group VI. The maximum oxidation state of these compound is $+6$. In the $Cr{O}_3,Mo{O}_3$ and $W{O}_3$ the oxidation state of $Cr,Mo$ and $W$ is also $+6$. In general the oxides of higher oxidation states of metal are acidic in nature. Therefore, $Cr{O}_3,Mo{O}_3$ and $W{O}_3$ are strongly acidic in nature.