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CuF2 is both paramagnetic and coloured due to unpaired electron in d-orbital (3d9 4s0).

1. CuF2 is paramagnetic due to unpaired electrons.
2. CuF2 is coloured due to unpaired electrons.
3. CuF2 is paramagnetic and coloured due to unpaired electrons.
4. CuF2 is neither paramagnetic nor coloured.

Correct answer: CuF2 is paramagnetic and coloured due to unpaired electrons.

Solution

CuF2 has a Cu2+ ion with an electronic configuration of 3d9. The unpaired electron in the d-orbital makes it paramagnetic and also causes d-d transitions, which result in its colour.

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