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A one litre is full of brown bromine vapours. The intensity of brown colour of vapours will not decrease appreciably on adding to the flask some
A. carbon disulphide
B. carbon tetrahloride
C. animal charcoal
D. piece of marble

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Correct Answer - 4
Because marble `(CaCO_(3))` has no chemical reaction with `Br_(2)`. On the other hand, `Br_(2)` is soluble in `CS_(2)` and `C Cl_(4)` while animal charcoal adsorbs bromine.

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