Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Metal Iron (II) sulphate Copper (II) sulphate Zinc sulphate Silver nitrate

A No reaction Displacement - -

B Displace ment - - -

C No reaction No reaction No reaction Displace ment

D No reaction No reaction No reaction No reaction

(a)
Use the Table above to answer the following questions about metals A, B, C and D.

(i) Which is the most reactive metal?
(b)
(ii) What would you observe if B is added to a solution of Copper (II) sulphate?

(c)
(iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.

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Solution

(a)
The metal B gives displacement reaction with iron(II) sulphate, while other metals don’t show any reaction with iron(II) sulphate. So, metal B is the most reactive metal among the given metals.

(b)

According to the reactivity series, iron is more reactive than copper, and metal B shows a displacement reaction with iron(II) sulphate solution.

So, metal B will also show displacement reaction, when added with copper(II) sulphate solution.

(c)
The decreasing order of reactivity of given metals is- B > A > C > D.

Metal B is most reactive because it displaces iron from iron(II) sulphate solution.

Metal A is less reactive than metal B, because it displaces less reactive copper from copper(II) sulphate solution.

Metal C is less reactive than A, because it displaces silver from silver nitrate solution.

Metal D is the least reactive among the given metals, because it doesn’t displace any metal from their given salt solutions.

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Similar questions

Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Use the Table above to answer the following questions about metals A, B, C and D.

(i) Which is the most reactive metal?

(ii) What would you observe if B is added to a solution of copper (II) sulphate?

(iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.

\begin{matrix} M e t a l & I r o n (I I) s u l p h a t e & C o o p e r (I I) s u l p h a t e & Z i n c s u l p h a t e & S i l v e r n i t r a t e A . & N o r e a c t i o n & D i s p l a c e m e n t B . & D i s p l a c e m e n t & N o r e a c t i o n C . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & D i s p l a c e m e n t D . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n \end{matrix}

\begin{matrix} M e t a l & I r o n (I I) s u l p h a t e & C o p p e r (I I) s u l p h a t e & Z i n c s u l p h a t e & S i l v e r n i t r a t e A . & N o r e a c t i o n & D i s p l a c e m e n t B . & D i s p l a c e m e n t & N o r e a c t i o n C . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & D i s p l a c e m e n t D . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n \end{matrix}

\begin{matrix} M e t a l & I r o n (I I) s u l p h a t e & C o p p e r (I I) s u l p h a t e & Z i n c s u l p h a t e & S i l v e r n i t r a t e A . & N o r e a c t i o n & D i s p l a c e m e n t B . & D i s p l a c e m e n t & N o r e a c t i o n C . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & D i s p l a c e m e n t D . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n \end{matrix}

\begin{matrix} M e t a l & I r o n (I I) s u l p h a t e & C o o p e r (I I) s u l p h a t e & Z i n c s u l p h a t e & S i l v e r n i t r a t e A . & N o r e a c t i o n & D i s p l a c e m e n t B . & D i s p l a c e m e n t & N o r e a c t i o n C . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & D i s p l a c e m e n t D . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n \end{matrix}

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