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D and F Block Elements question

2012 · Shift 1 · Q13
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D and F Block Elements question

2012 · Shift 1 · Q13

JEE AdvancedChemistryD and F Block ElementsMCQ+3 / −1
The colour of light absorbed by an aqueous solution of CuSO4CuSO_4CuSO4​ is
  1. A
    orange-red
  2. B
    blue-green
  3. C
    yellow
  4. D
    violet
View written solutionFree

Correct answer: A

  1. Identify the observed colour of the solution

    An aqueous solution of CuSO4CuSO_4CuSO4​ appears blue.

  2. Use the complementary colour concept

    The colour we observe is the colour transmitted (or reflected), while the colour absorbed is its complementary colour.

    Since the solution looks blue, it absorbs light in the complementary region, which is orange-red.

  3. Match with the given options

    • A: orange-red
    • B: blue-green
    • C: yellow
    • D: violet

    Therefore, the absorbed colour is orange-red.

  4. Final answer

    A: orange-red\boxed{\text{A: orange-red}}A: orange-red​

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