JEE Main Chemistry question

Mark the wrong statement regarding why halogens are all coloured:

(A)This is due to absorption of light by their molecules resulting in the excitation of outer electrons to higher energy levels
(B)The small molecules absorb high-energy violet radiation and appear yellow; the large molecules absorb low-energy yellow and green radiations and appear violet in colour
(C)(continuation of the above colour explanation)
(D)The excitation energy required by the small fluorine atoms is smaller than that required by the large iodine atomCorrect

Answer: (D)

Solution

Colour in halogens arises from absorption of visible light that excites outer (non-bonding/antibonding) electrons to higher energy levels — statement (A) is correct. Since smaller, more tightly bound molecules require higher-energy (violet) photons for

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Question ID VK-146788