d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge - Page 227

Question 1131

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Why do transition metals form a large number of complex compounds?

Comparatively smaller sizes of metal ions
High ionic charges
Availability of d orbitals
All of the above

Question 1132

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What is the main reason transition metal ions form coloured solutions?

Presence of s electrons
Presence of completely filled d orbitals
Presence of partially filled d orbitals allowing d-d transitions
Presence of f electrons

Question 1133

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Why is the Sc3+ ion colourless?

It has a completely filled 3d subshell
It has paired electrons
It has an empty 3d subshell (3d0)
It is paramagnetic

Question 1134

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Why is the Zn2+ ion colourless?

It has no d electrons
It has one unpaired electron
It has a completely filled 3d subshell (3d10)
It is diamagnetic

Question 1135

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Which electronic configuration would most likely result in a colourless ion?

3d1
3d5
3d0
3d9