When hydrogen sulphide and sulphur dioxide are each passed in turn into a solution of potassium dichromate?
-
A.
both gases change the colour of the solution from yellow to colourless -
B.
both gases causes sulphur to be deposited -
C.
only hydrogen sulphide decolourizes the solution -
D.
only sulphur dioxide deposits sulphur -
E.
only hydrogen sulphide deposits sulphur