Elements which generally exhibit variable oxidation states and form colored ions are ___________.
metalloids
transition elements
non-metals
gases
A
transition elements
B
metalloids
C
gases
D
non-metals
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Solution
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Transition elements have vacant d orbitals and the energy gap between d orbitals is very less. So transition elements exhibit variable oxidation state and form coloured ions as these elements emit radiations due to excitation of d electrons.
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