2002
Chemistry
67ca00ce0c643c71d77dee1f
A rock sample was added to cold dilute HNMO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The rock sample contains
A.
NO3-
B.
Cl-
C.
SO42-
D.
SO32-
Correct Answer: SO32-
Explanation
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