Question

Science
nples of four metals A, B, C and D were taken and
added to the following solutions one by one. The results
obtained have been tabulated as shown.
Metal Iron(II)
Copper(II) Zinc
Silver
sulphate sulphate
sulphate nitrate
A No reaction Displacement
B Displacement
No reaction
C No reaction No reaction
No reaction displacement
D No reaction No reaction No reaction No reaction
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.
tunnotive metal
erties of​

Answer 1

Ans

(i) B is the most reactive metal

(ii)If B is added to a solution of copper (II) sulphate, displacement reaction will take place. Blue colour of copper sulphate will fade and red –brown copper will settle down.

(iii) The decreasing order of reactivity is:

B> A> C >D

Answer 2

$\huge\rm\underline\purple{Question :-}$

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

$</p><p>\begin{tabular}{|c|c|c|c|c|}</p><p></p><p></p><p></p><p></p><p> \cline{1-5} Metal & Iron( II ) Sulphate & Copper ( II ) Sulphate & Zinc sulphate & Silver nitrate \\</p><p></p><p> \cline{1-5} A & No reaction & Displacement & & \\</p><p></p><p>B & Displacement & & No reaction & \\</p><p></p><p>C & No reaction & No reaction & No reaction& Displacement \\</p><p>D & No reaction & No reaction & No reaction& No reaction \\</p><p></p><p></p><p> \cline{1-5}</p><p></p><p>\end{tabular}</p><p>$

(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.

$\large{\underbrace{\sf{\red{ Required\:Answer :}}}}$

(i) B is the most reactive metal. [because it gives displacement reaction with Iron (II) sulphate].

(ii) When metal B is added to copper (II) sulphate solution, a displacement will take place due to which the blue colour of copper (II) sulphate solution will fade and a red-brown deposit of copper will be formed on metal B.

(iii) Metal B is the most reactive, metal A is less reactive, metal C is still less reactive, and metal D is the least reactive. So, the decreasing order of reactivity of the metals is: B > A > C > D.

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