Question:
Which of the following elements is colourless?
Which of the following elements is colourless?
Show Hint
Metal ions with completely filled or empty d-orbitals (like Ti\(^{4+}\)) do not absorb visible light, making them colourless.
Updated On: Mar 28, 2026
- Ti\(^{4+}\)
- Fe\(^{2+}\)
- Fe\(^{3+}\)
- None of these
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
The colour of a metal ion in solution is due to the presence of partially filled d-orbitals that can absorb light in the visible region.
- Ti\(^{4+}\) has no d-electrons and therefore does not absorb light in the visible region, making it colourless.
- Fe\(^{2+}\) and Fe\(^{3+}\) both have partially filled d-orbitals, which absorb light in the visible region and give the solutions a colour. Thus, the correct answer is option (A).
- Ti\(^{4+}\) has no d-electrons and therefore does not absorb light in the visible region, making it colourless.
- Fe\(^{2+}\) and Fe\(^{3+}\) both have partially filled d-orbitals, which absorb light in the visible region and give the solutions a colour. Thus, the correct answer is option (A).
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