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- 1. Multiple Choice
A green precipitate that dissolves to form a dark green solution on adding excess NaOH contains
Fe3+
Mn2+
Cu2+
Cr3+
- 2. Multiple Choice
Cr2+
Chromium
Chromium 2
Chromate
Chromium (II)
- 3. Multiple Choice
Cr3+
Chromium (III)
Chromium
Chromium (3)
Chromate (III)
- 4. Multiple Choice
What could the name of the solution on the left be?
Sodium chromate
Potassium Dichromate (VI)
Potassium Chromate (VI)
Sodium Chromate (VI)
- 5. Multiple Choice
Which is the colour of Vanadium (III)
Blue
Green
Violet
Yellow
- 6. Multiple Choice
What colour will the Green Cr3+ turn after I add H2O2 and NaOH?
Yellow
Green
Blue
Orange
- 7. Multiple Choice
Which one is not a redox reaction
Cr2O72- + 14H+ + 6e- ⇌ 2Cr3+ + 7H2O
Cr2O72- + H2O ⇌ 2CrO4- + 2H+
Cr2O72- + 14H+ + 6e- ⇌ 2Cr3+ + 7H2O
Cr3+ + e- ⇌ Cr2+
- 8. Multiple Choice
Tetraaquadihydroxocopper (II) is
dark blue
a pale blue ppt
a blue solution
yellow (but looks green)
- 9. Multiple Choice
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
- 10. Multiple Choice
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
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