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COMEDK20269 May 2026Evening ShiftChemistryd and f Block ElementsActual

Which of the following does not correctly represent the order of the property indicated against it?

Options

  1. ATi ³⁺ < V ³⁺ < Cr ³⁺ < Mn ³⁺ [Increasing order of magnetic moment]
  2. BTi < V < Cr < Mn [Increasing order of highest oxidation state]
  3. CTi < V < Cr < Mn [Increasing order of melting point]
  4. DTi < V < Mn < Cr [Increasing order of second ionisation enthalpy]

Correct answer

C. Ti < V < Cr < Mn [Increasing order of melting point]

Step-by-step solution

The magnetic moment depends on the number of unpaired electrons. The electronic configurations of the given ions are Ti ³⁺ ( 3d¹ ), V ³⁺ ( 3d² ), Cr ³⁺ ( 3d³ ), and Mn ³⁺ ( 3d⁴ ). The number of unpaired electrons increases from 1 to 4, so the magnetic moment increases in the order Ti ³⁺ The highest oxidation states shown by the elements are Ti (+4), V (+5), Cr (+6), and Mn (+7). The order Ti The melting point of transition metals depends on the strength of metallic bonding, which is related to the number of unpaire

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