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# A one litre flask is full of brown bromine fumes. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some

(a) pieces of marble
(b) animal charcoal powder
(c) $CCl_4$
(d) $CS_2$

Marble ($CaCO_3$) does not react, adsorb, absord or dissolve $Br_2$. As such  there is no change in colour of $Br_2$
edited Jan 29, 2014