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Which of the following compounds would you expect to show strong absorption in t

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Question: Which of the following compounds would you expect to show strong absorption in the UV region?

Options:

  1. Alkanes
  2. Aromatic compounds
  3. Alcohols
  4. Carboxylic acids

Correct Answer: Aromatic compounds

Solution: 

Aromatic compounds have delocalized π electrons that can absorb UV light, leading to strong absorption in the UV region, unlike alkanes which do not absorb UV light.

Which of the following compounds would you expect to show strong absorption in t

Practice Questions

Q1
Which of the following compounds would you expect to show strong absorption in the UV region?
  1. Alkanes
  2. Aromatic compounds
  3. Alcohols
  4. Carboxylic acids

Questions & Step-by-Step Solutions

Which of the following compounds would you expect to show strong absorption in the UV region?
  • Step 1: Understand what UV absorption means. UV absorption occurs when a compound can absorb ultraviolet light.
  • Step 2: Identify the types of compounds. Aromatic compounds have a special structure with delocalized π electrons, while alkanes are simple hydrocarbons without this structure.
  • Step 3: Recognize that delocalized π electrons in aromatic compounds can interact with UV light, allowing them to absorb it.
  • Step 4: Compare aromatic compounds to alkanes. Alkanes do not have delocalized π electrons, so they do not absorb UV light.
  • Step 5: Conclude that aromatic compounds will show strong absorption in the UV region, while alkanes will not.
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