What happens to the colour of bromine water when SO2 is passed into the solution?
The orange brown color fades away
The color remains the same
Orange brown solution turns to yellow
Orange brown solution tuns to green
Bromine gas gets oxidised to hydrobromic acid and as a result, the brown colour (due to bromine water) fades away.
What happens when SO2 gas is passed through a potassium dichromate solution?
The elements of sets A , B and C are all colours as follows:
A = { Red , Orange , Yellow , Brown } ,
B = { Blue , Yellow , Green , Brown } ,
C = { Black , Brown , White , Grey }
Then, A U B U C is