Chemistry > 2002 > 25
JAMB UTME
A rock sample was added to cold dilute HNO3. The gas evolved was passed into
a solution acidified K2Cr2O7 and the solution turned green. The rock sample contains
a solution acidified K2Cr2O7 and the solution turned green. The rock sample contains
A.
NO3-
B.
Cl-
C.
SO42-
D.
SO32-
Answer: D
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