R e als with us of Vallon Yes, turns Yes, alumi Yes, aluminum turns brown solution...

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	Ca²⁺	Cu²⁺	Fe³⁺	Fe²⁺	Mg²⁺	Sn⁴⁺	Zn²⁺	Al³⁺
Ca	×	Yes, calcium dissolves.	Yes,calcium dissolves.	Yes, calcium dissolves.	Yes, calcium dissolves	Yes, calcium dissolves	Yes, Calcium dissolves.	Yes, calcium dissolves.
Cu	N.R.	×	N.R.	N.R.	N.R.	N.R	N.R	N.R
Fe	N.R.	Yes, iron dissolves	×	×	N.R	Yes, iron dissolves.	N.R	N.R
Mg	N.R.	Yes, Magnesiun dissolves.	Yes, magnesium dissolves	Yes, Magnesiun dissolves.	×	Yes, Magnesiun dissolves.	Yes, magnesium dissolves.	Yes, magnesium dissolves.
Sn	N.R	Yes, tin dissolves.	N.R	N.R.	N.R.	×	N.R.	N.R.
Zn	N.R.	Yes, zinc dissolves.	Yes,zinc dissolves	Yes, zinc dissolves.	N.R	Yes, zinc dissolves.	×	N.R.
Al	N.R.	Yes, Aluminium dissolves.	Yes, Aluminium dissolves.	Yes, Aluminum dissolves.	N.R	Yes, Aluminum dissolves.	Yes, Aluminum dissolves.	×

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All these reactions are examples of displacement reactions. In displacement reaction, more reactive metal displaces less reactive metal from its salt solutions.

The Reactivity series of metals (in order of decreasing reactivity down the group):-

Potassium K (Most Reactive Metal)

Sodium. Na

Calcium. Ca

Magnesium Mg

Aluminium Al

Zinc Zn

Iron. Fe

Tin Sn

Lead Pb

Hydrogen H

Copper. Cu

Mercury. Hg

Silver Ag

Gold. Au

Platinum Pt (Least reactive metal)

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