Transition Metals quiz

Which of these ions is violet in colour?

• V²⁺

• V³⁺

• VO²⁺

• VO₂⁺

An element where the last electron added was into a d subshell is the definition of...

• Transition Metal

• d-block element

• catalytic ion

• complex ion

What is a ligand

• An atom, molecule or ion that forms a dative covalent bond to a central metal ion in a complex.

• An atom, molecule or ion that accepts a pair of electron from a central metal ion in a complex.

• A central metal ion with one or more covalent bonds to it

• A d-block element that has a partially filled d subshell

Tetraaquadihydroxocopper (II) is

• dark blue

• a pale blue ppt

• a blue solution

• yellow (but looks green)

Which Hydroxide Precipitate is "Amphoteric"

• [Cu(H₂O)₄(OH)₂]

• [Fe(H₂O)₄(OH)₂]

• [Cr(H₂O)₃(OH)₃]

• [Fe(H₂O)₃(OH)₃]

VO₂⁺ --> VO²⁺ --> V³⁺ --> V²⁺

• Yellow --> (Green) --> Blue ---> Violet --> Green

• Yellow --> Orange --> Green ---> Blue

• Yellow --> (Green) --> Blue ---> Green --> Violet

• Violet --> Green --> Blue ---> (green)--> Yellow

The coordination number of [Cu(en)₃]²⁺ is

• 3

• 6

• 2

• 12

The number of en ligands dative covalently bonded to Cu in [Cu(en)₃]²⁺ is

• 3

• 6

• 2

[Cu(H₂O)₆]²⁺ + edta^4- <−−>[Cu(edta)]^2- + 6H₂O

• The entropy decreases from left to right

• The entropy increases from right to left

• The entropy increases from left to right

Which is not an example of a ligand substitution reaction?

• [Cu(H₂O)₆]²⁺ + 2OH^- --> [Cu(H₂O)₄(OH)₂] + 2H₂O

• [Cu(H₂O)₆]²⁺ + 4Cl^- --> [Cu(Cl)₄]^2- + 6H₂O

• [Cu(H₂O)₄(OH)₂] + 4NH₃ --> [Cu(H₂O)₂(NH₃)₄]²⁺ + 2H₂O + 2OH^-

• [Cu(H₂O)₆]²⁺ + 3en --> [Cu(en)₃]²⁺ + 6H₂O