Question

Arrange the following in increasing order of their reactivit
Zn, Al, Cu, Fe, Mg. Ag, Na, Ca and Au
What is displacement reaction? Explain with example.​

Answer 1

Answer:

Sodium (Na)

Calcium (Ca)

Magnesium (Mg)

Aluminium (Al)

Zinc (Zn)

Iron (Fe)

Copper (Cu)

Silver (Ag)

Gold (Au)

Explanation:

Displacement Reaction

The reaction in which more reactive metal displace or take the place of less reactive metal in the salt solution.

Eg. copper sulphate + zinc → zinc sulphate + copper

           CuSO4           +   Zn →   ZnSO4          +  Cu

Here, zinc is more reactive than copper so it takes the place of copper from copper sulphate solution

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Answer 2

Q. Arrange the following in increasing order of their reactivity.

Zn, Al, Cu, Fe, Mg, Ag, Na, Ca and Au.

Answer:-

Correct order is :-

K > Na > Ca >Mg > Al > Zn > Fe > Ag > Au.

Reactivity series :- The arrangement of metals in a vertical column according to their increasing order of reactivity is known as reactivity series.

• In reactivity series the reactive metal are at top and the less reactive metal at the bottom.

• If we go up in reactivity series the reactivity increases and when we go bottom to the reactivity series the reactivity decreases.

Displacement reaction :- The reaction in which a highly reactive metal displaces less reactive metal is know as displacement reaction.

Ex :- AgNO3 + Na → NaNO3 + Ag

here Na is more - reactive than silver so it displaces silver and forms sodium nitrate.

For more Info. about displacement reaction.

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