Question

Which of the following represent the correct order of decreasing reactivity?

Mg > Al > Zn > Fe

Mg > Zn > Al > Fe

Al > Zn > Fe > Mg

Mg > Fe > Zn > Al

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Answer 1

Reactivity series(Displacement Reaction)

Reactivity series also known as displacement reaction are a series of metals that are placed in the reactivity higher to lower .

Here is the series of reactivity(high to low)

• Potassium(k)
• Sodium(Na)
• Calcium(Ca)
• Magnesium(Mg)
• Aluminium(Al)
• Carbon(C)
• Zinc(Zn)
• Iron(Fe)
• Tin(Sn)
• Lead(Pb)
• Hydrogen(H)
• Copper(Cu)
• Silver(Ag)
• Gold(Au)
• Platinum(Pt)

                                                                                             

Need to express in decreasing reactivity

1. Mg > Al > Zn > Fe=Fe=>Zn=>Al=>Mg
2. Mg > Zn > Al > Fe=>Fe=>Zn=>Al=>Mg
3. Al > Zn > Fe > Mg=>Fe=>Zn=>Al=>Mg
4. Mg > Fe > Zn > Al=Fe=>Zn=>Al=>Mg

Answer 2

Answer:

Mg > Al > Zn > Fe

Explanation:

HINT;lets have pnemonics

        PSBC  MAZINTL CHAAP  [In decreasing order of reactivity]

i.e,K>Na>Ba>Ca>Mg>Al>Zn>Fe>Ni>Sn>Pb>H>Cu>Hg>Ag>Au>Pt

   

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