Question

The early transition metals on the left hand side of the d-block generally occur as oxides because

• A. they are above hydrogen in electrochemical series
• B. they are more electropositive and thus form ionic compounds (in the form of oxides) by more electronegative oxygen by exchange of electrons
• C. these oxides are soluble in water
• D. these oxides remain insoluble in water

Answer 1

The correct option is B they are more electropositive and thus form ionic compounds (in the form of oxides) by more electronegative oxygen by exchange of electrons

The early transition metals on the left hand side of the d-block are electropositive in nature. They exchange electrons with more electronegative elements such as oxygen to form ionic compounds such as oxides.
Hence, these transition metals occur as oxide minerals.