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On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. This alkane could be

1. pentane
2. isopentane
3. neopentane
4. propane

Correct answer: neopentane

Solution

Neopentane has a symmetrical structure that allows for only one unique position for chlorine substitution, resulting in a single monochloroalkane product when reacted with chlorine under UV light.

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