Which of the following is true about how zinc prevents the rusting of iron? (P) A galvanised iron article does not undergo oxidation. (Q) The zinc coating prevents contact of iron... Which of the following is true about how zinc prevents the rusting of iron? (P) A galvanised iron article does not undergo oxidation. (Q) The zinc coating prevents contact of iron with air. (R) Zinc undergoes corrosion more easily than iron.
Understand the Problem
The question is asking about the principles of galvanisation, electrolysis, the properties of metals, and the uptake of water in plants. It requires knowledge of chemistry concepts.
Answer
(d) only Q and R
The final answer is (d) only Q and R.
Answer for screen readers
The final answer is (d) only Q and R.
More Information
Zinc prevents iron from rusting by forming a barrier that blocks air and moisture (statement Q) and by corroding more easily than iron, thereby protecting it even when scratched (statement R).
Tips
A common mistake is assuming that the zinc layer itself does not undergo oxidation. It actually oxidizes to protect the iron.
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