Upon addition of excess ammonia a solution containing chromium turns what colour?
Respuesta
Green
Violet
Purple
Blue
Pregunta 2
Pregunta
Which of these are the correct colours for the metal aqua ions listed?
Respuesta
Cu (II) - Blue Solution
Fe (III) - Green Solution
Cr (III) - Purple Solution
Ni (II) - Blue Solution
Mn (II) - Pale Pink Solution
Zn (II) - White Solution
Fe (II) - Green Solution
Pregunta 3
Pregunta
Which of the following transition metals display a change upon the further addition of hydroxide ions (assuming small amounts have already been added)?
Respuesta
Cu (II)
Cr (III)
Ni (II)
Zn (II)
Fe (II)
Pregunta 4
Pregunta
Copper (II) forms a deep blue solution upon addition of excess hydroxide ions.
Respuesta
True
False
Pregunta 5
Pregunta
Which of these is the correct change observed for the transition metal ion listed upon the addition of small amounts of hydroxide ions or ammonia?
Respuesta
Cu (II) - Blue ppt forms
Fe (III) - Green ppt forms
Fe (II) - Brown ppt forms
Mn (II) - Pink ppt forms
Zn (II) - White ppt redissolves to form colourless solution
Cr (III) - Green ppt forms
Ni (II) - Green ppt forms
Pregunta 6
Pregunta
Chromium is the only transition metal to display amphoteric behaviour?
Respuesta
True
False
Pregunta 7
Pregunta
Zn (II) will have how many ammonia groups bonded to it as a complex ion?
Respuesta
2
4
6
3
Pregunta 8
Pregunta
+6 is the most stable ion of Chromium.
Respuesta
True
False
Pregunta 9
Pregunta
Copper is the only transition metal for form +1 ions.
Respuesta
True
False
Pregunta 10
Pregunta
Cu (I) is unstable and will undergo disproportionation in solution.
Respuesta
True
False
Pregunta 11
Pregunta
Cu (I) compounds aren't coloured due to it having a full 3d subshell.