Discussion
Assertion (A): Assertion: An auxochrome absorbs strongly in the ultraviolet on its own.
Reason (R): Reason: An auxochrome shifts a chromophore's band when attached to it.
Select the correct answer from the options below.
Answer: D
The reason is true and is precisely why the assertion is false: an auxochrome is defined as a group with no accessible band of its own that nevertheless modifies a chromophore's. A group that did absorb strongly alone would be a chromophore. The two terms divide the substituents into those that produce absorption and those that only alter it, and that division is the whole point of having two words.
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