Colours of Inorganic Ions and Complexes

The color of [Cu(H2O)6]2+ is:

• Pale blue

• Green

• Yellow

• Deep red

The color of [Cu(NH3)4(H2O)2]2+ is:

• Dark blue

• Green

• Pale yellow

• Red

What is the color of [CuCl4]2-?

• Blue

• Green

• Yellow

• Red

What is the color of [Cr(H2O)6]3+?

• Red

• Pale purple

• Green

• Yellow

The color of [Cr(NH3)6]3+ is:

• Deep purple

• Pale yellow

• Green

• Blue

The color of Cr2O7 2- is:

• Red

• Blue

• Green

• Orange

What is the precipitate color when NaOH is added dropwise to Fe2+ (aq)?

• Green

• Brown

• White

• Blue

What is the color of Fe(OH)3?

• Red

• Brown

• Green

• Yellow

What is the precipitate color when NH3 is added dropwise to Cr3+?

• Red

• Dark green

• Brown

• Pale blue

What is the color change from MnO4 -/Fe2+ to Mn2+/Fe3+?

• Purple to colorless

• Purple to pale pink

• Purple to yellow

• Purple to green