Which of the following statements is correct?

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

Which of the following statements is correct? (1)

[\text{CoF}_6]^{3-}

and

[\text{Co}(\text{NH}_3)_6]^{3+}

are both paramagnetic complexes. (2)

[\text{CoF}_6]^{3-}

and

[\text{Co}(\text{NH}_3)_6]^{3+}

are both high-spin complexes. (3)

[\text{CoF}_6]^{3-}

is octahedral while

[\text{Co}(\text{NH}_3)_6]^{3+}

has a pentagonal-pyramidal shape. (4)

[\text{CoF}_6]^{3-}

is an outer-orbital complex while

[\text{Co}(\text{NH}_3)_6]^{3+}

is an inner-orbital complex.