Question 40
Metals and their CompoundsWhich of the following is the correct order of decreasing activity of the metals Fe, Ca, Al and Na?
- A.Fe > Ca > Al > Na
- B.Na > Ca > Al > Fe
- C.Al > Fe > Na > Ca
- D.Ca > Na > Fe > Al
Show the answer and explanation
Answer: B (Na > Ca > Al > Fe)
Explanation
In the activity series the order is K, Na, Ca, Mg, Al, Zn, Fe and so on. These four therefore run Na > Ca > Al > Fe.