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Preparation from Cold Water and Metals

K, Ca, Na, Mg...

Question

K, Ca, Na, Mg, Al, Zn, Fe, Pb, Cu, Ag. Name metal
(i) Which will displace hydrogen from cold water

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Solution

The reactivity series of metals,
Also known as the activity series, refers to the arrangement of metals in the descending order of their reactivities.
Therefore only K (Pottasium), Ca (Calcium), and Na (Sodium) displace the hydrogen from cold water.
Mg, Al, Zn, Fe, Pb, Cu, and Ag these does not react with water

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