Many chemical compounds have characteristic colours, which can be used for identification or in analytical chemistry. The colour arises from the absorption and reflection of light due to the electronic structure of the compound, particularly in transition metal compounds like copper sulphate and potassium permanganate, or in some ionic or covalent compounds.
Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Compound) A. Urea B. Hydrous copper sulphate C. Lead sulphide D. Potassium permanganate List-II (Colour) 1. Blue 2. White 3. Pinkish purple 4. Black Code : A B C D (a) 2 1 4 3 (b) 2 4 1 3 (c) 3 4 1 2 (d) 3 1 4 2
Asked in UPSC CAPF 2015 · Topic: Inorganic Chemistry (Chemistry of Main Group Elements (s-block and p-block))
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