1. Tardigrade
  2. Question
  3. Chemistry
  4. Statement 1: The lowest oxide of a transition metal (say, chromium, atomic number 24) is basic whereas the highest oxide is usually acidic. Statement 2: Cr2O3 is amphoteric in nature

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Q. Statement 1: The lowest oxide of a transition metal (say, chromium, atomic number 24) is basic whereas the highest oxide is usually acidic.
Statement 2: $Cr_2O_3$ is amphoteric in nature

The d-and f-Block Elements

Solution:

Both are correct statements but statement 2 is not correct explanation of statement 1. As the oxidation states of metals increase, the electronegativity values also increase. As a result the difference of electronegativities between metal and oxygen decreases and, therefore, acidic character of oxides increase.