If hydrogen sulphide gas is passed into a solution of a pure iron chloride, a yellow deposit appears. If the deposit is filtered, a pale green solution is left behind. The pale green solution is
-
A.
dilute sulphuric acid -
B.
dilute hydrochloric acid -
C.
unreacted hydrogen sulphide in water -
D.
iron (III) chloride -
E.
Iron (II) chloride