Question

Bromine water reacts with \[{\text{S}}{{\text{O}}_{\text{2}}}\] to form
A)${{\text{H}}_{\text{2}}}{\text{O}}\,\,{\text{& }}\,\,{\text{HBr}}$
B)${{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}\,\,{\text{& }}\,\,{\text{HBr}}$
C)${\text{HBr}}\,\,{\text{& }}\,\,{\text{S}}$
D)${\text{S}}\,\,{\text{& }}\,\,{{\text{H}}_{\text{2}}}{\text{O}}$

Answer 1

Hint: Bromine water is an oxidising, intense yellow-to-red solution of diatomic bromine $\left( {B{r_2}} \right)$ in water ${H_2}O$. It is often used as a reactive in chemical assays of recognition for substances that halogenate with bromine in an aqueous setting, mostly unsaturated carbon compounds (carbon compounds with one or more double or triple bond(s)).

Complete step-by-step answer:
Phenols, alkenes, enols, the acetyl group, aniline, and glucose are the most common compounds that react well with bromine water. Furthermore, bromine water is often used to detect the presence of an alkene with a double covalent bond, which reacts with the bromine water and changes its colour from a bright yellow to a colourless solution. Bromine water is often widely used to determine if a compound contains an aldehyde group. The colour of bromine water is also modified to colourless from yellow in this reaction (oxidation process).
Bromine water reacts with ${\text{S}}{{\text{O}}_{\text{2}}}$to form ${{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}\,{\text{& }}\,{\text{HBr}}$
\[{\text{B}}{{\text{r}}_{\text{2}}}\,{\text{ + }}\,{\text{2}}{{\text{H}}_{\text{2}}}{\text{O}}\,{\text{ + }}\,{\text{S}}{{\text{O}}_{\text{2}}}\,\, \to \,\,{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}\,{\text{ + }}\,{\text{2HBr}}\]

Hence, the correct answer is option ‘B’.

Additional Information: As an alternative to chlorine, bromine is commonly used as a water purifier and disinfectant. Brominated compounds are used in swimming pools and hot tubs to treat the water, as well as in industrial processes to regulate algae and bacterial growth.

Note: With the chemical formula ${\text{B}}{{\text{r}}_{\text{2}}}$, bromine water is also known as bromide bromate solution or bromine solution. Bromine water has a molecular weight of $159.81$ and a density of ${\text{1}}{\text{.307}}\,{\text{g/mL}}$. By using the halogenation process, bromine water is used to classify the functional group present in an organic compound.