# 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, adsorb or dissolve $Br_2$. So the intensity of brown colour of $Br_2$ will not decrease. Other compounds will decrease the intensity of brown colour of $Br_2$
edited Mar 25