Question

A one litre flask is full of reddish brown bromine fumes. The intensity of brown colour of vapour will decrease appreciably on adding to the flask x number of species from the following
find x.
(i) Marble pieces
(ii) Animal charcoal powder
(iii) $CC{l}_4$
(iv) $C{S}_2$
(v) Water

• A. (3)
• B. (2)
• C. (1)
• D. (4)

Answer 1

The correct option is A (3)

Marble $\left(CaC{O}_3\right)$ do not react, absorb or dissolve $B{r}_2$. As such there is no change in colour of $B{r}_2$. Remaining dissolves or absorb bromine, $B{r}_2$ dissolve partially in water.