Question:
Match the LIST-I (Wavelength) with LIST-II (Chromophore):
Match the LIST-I (Wavelength) with LIST-II (Chromophore):
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Carbonyls (C=O) always have a distinct peak in the 270-290 nm range due to non-bonding electrons.
Updated On: May 28, 2026
- A-I, B-IV, C-II, D-III
- A-III, B-IV, C-II, D-I
- A-III, B-I, C-II, D-IV
- A-III, B-II, C-IV, D-I
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The Correct Option is C
Solution and Explanation
Step 1: Concept
A chromophore is a functional group that absorbs UV or visible light at specific wavelengths.
Step 2: Meaning
Different groups have characteristic absorption maximums ($\lambda_{max}$).
Step 3: Analysis
Alkene (III) typically absorbs around 177 nm. Nitrate (I) has a characteristic peak around 186 nm. Amido (II) groups absorb near 214 nm. Carbonyl (IV) groups have a weak $n \rightarrow \pi^*$ transition near 270 nm.
Step 4: Conclusion
The correct matches are A-III, B-I, C-II, D-IV.
Final Answer: (C)
A chromophore is a functional group that absorbs UV or visible light at specific wavelengths.
Step 2: Meaning
Different groups have characteristic absorption maximums ($\lambda_{max}$).
Step 3: Analysis
Alkene (III) typically absorbs around 177 nm. Nitrate (I) has a characteristic peak around 186 nm. Amido (II) groups absorb near 214 nm. Carbonyl (IV) groups have a weak $n \rightarrow \pi^*$ transition near 270 nm.
Step 4: Conclusion
The correct matches are A-III, B-I, C-II, D-IV.
Final Answer: (C)
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