A piece of copper metal is put into four test tubes labelled as A,B, C & D containing solutions of copper sulphate, silver nitrate, Aluminium sulphate and iron sulphate 1 respectively. Which one of the following will change to a blue coloured solution after the reaction?
a. Test tube A
b. Test tube B
c. Test tube C and D
d. All the test tubes
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Answers
Answer:
Four metals A, B, C and D are in turn added to the following solutions one by one. The observations made are tabulated below.
Metal Iron (II) sulphate Copper (II) sulphate Zinc sulphate Silver 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
Answer the following based on the above information :
(i) Which is the most reactive metal? Why?
(ii) What would be observed, if 'B' is added to a solution of Copper (II) sulphate and why?
(iii) Arrange the metals A, B, C and D in order of increasing reactivity.
(iv) Which one among A, B, C and D metals can be used to make containers that can be used to store any of the above solutions safely
Answer:
I think test tube B
b. Silver nitrate
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