97CE CHEMISTRY PAPER2 Q29
An iron nail is heated with concentrated sulphuric acid.Which of the following combinations is correcr
Gas given off Color of solution formed
A.Hydrogen Pale Green
B.Hydrogen Yellow
C.Sulphur dioxide Pale Green
D.Sulphur dioxide Yellow
Please give me an answer with clear explanation!!!
化學試題請教
2007-07-31 7:53 pm
回答 (2)
2007-07-31 8:06 pm
✔ 最佳答案
Answer is D.Conc H2SO4 is a strong oxidizing agent.
It will oxidize Fe into Fe (3+) and itself will reduce.
Therefore, H2SO4 will reduce to SO2.
And SO2 gas is brownish yellow.
2007-07-31 7:58 pm
D.
Chemical reaction between Iron Oxide and Sulphuric acid will evolve Sulphur Dioxide which is in yellow color.
Chemical reaction between Iron Oxide and Sulphuric acid will evolve Sulphur Dioxide which is in yellow color.
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