Question

which of these metal can displace all the other three metals from their salt solution
a. copper
b. iron
c. silver
d. zinc

Answer 1

Silver:

2AgNO3 + Mg >> 2Ag + Mg(NO3)2

2AgNO3 + Cu >> 2Ag + Cu(NO3)2

2AgNO3 + ZN >> 2Ag + Zn(NO3)2

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Answer 2

Zinc can displace all the other three metals from their salt solution

Explanation:

Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.

As the metals are arranged in order of decreasing reactivity as zinc, iron , copper and silver, thus most reactive metal zinc will be able to displace other metals from their salt solutions.

$Zn+CuSO_4\rightarrow ZnSO_4+Cu$

$Zn+FeSO_4\rightarrow ZnSO_4+Fe$

$Zn+AgCl_2\rightarrow ZnCl_2+2Ag$

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