Properties of chromium as a transition element

Properties of chromium as a transition element

1. Forms colored compounds; for instance Cr³⁺ is green
2. Has variable oxidation states; +2, +3, +4, +5, +6.
3. Forms complexes, e.g. Cr(NH₃)₆^3+.
4. has catalytic properties: for instanceCr₂O₃ + ZnO catalyzes formation of methanol from CO and hydrogen.

CO (g) + 2H₂(g) → CH₃OH

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