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Q.
The oxides, $ CrO_{3},\,MoO_{3} $ and $ WO_{3} $ are strongly
AMUAMU 2000
Solution:
Chromium, molybdenum and tungsten are transition element. They are present in group VI. The maximum oxidation state of these compound is $+6$. In the $CrO _{3}, MoO _{3}$ and $WO _{3}$ 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, $CrO _{3}, MoO _{3}$ and $WO _{3}$ are strongly acidic in nature.