Photo AI
In which of the following sets are all the compounds likely to be coloured? A - VCE - SSCE Chemistry - Question 16 - 2003 - Paper 1
Question 16
In which of the following sets are all the compounds likely to be coloured? A. KClO₄, FeCl₃, NH₄VO₃ B. Ca₃(PO₄)₂, NH₄VO₃, MgBr₂ C. FeCl₃, NiCl₂, K₂CrO₄ D. KC... show full transcript
Worked Solution & Example Answer:In which of the following sets are all the compounds likely to be coloured? A - VCE - SSCE Chemistry - Question 16 - 2003 - Paper 1
Step 1
C. FeCl₃, NiCl₂, K₂CrO₄
Answer
To determine which compounds are likely to be colored, we need to consider the presence of transition metals and certain anions that produce colors in solutions.
-
FeCl₃ (Iron(III) Chloride): Contains Fe³⁺ ions which are known to impart a yellow-brown color in solutions due to d-d transitions.
-
NiCl₂ (Nickel(II) Chloride): Contains Ni²⁺ ions which often produce a green color in solutions due to d-d transitions.
-
K₂CrO₄ (Potassium Chromate): Contains CrO₄²⁻ ions, known for their bright yellow color in solutions.
Thus, all compounds in option C are colored, confirming it as the correct answer.