Question

Statement 1: The free gaseous chromium atom has six unpaired electrons.
Statement 2: Half-filled orbital has greater stability than fully filled

• A. If both Statement 1 and Statement 2 are true and the statement 2 is the correct explanation o f the statement 1.
• B. If both Statement 1 and Statement 2 are true but statement 2 is not the correct explanation o f the statement 1.
• C. If Statement 1 is true but Statement 2 is false.
• D. If Statement 1 is false but Statement 2 is true

Answer 1

Answer: (C)

Statement 1: True, Electron configuration of $Cr\left(g\right)is\left[Ar\right]1^{8} 3d^{5} 4s^{1}$and, therefore, it has six unpaired electrons.
Statement 2: False, Fully filled orbital is more stable than half filled orbital on account of more number of exchange of electrons resulting into the greater release of exchange energy.