Question

20. Copper sulphate solution can be safely kept in a container made of silver and lead.
(a) True
(b) False
(c) Can't say
(d) Partially true false​

Answer 1

Answer:

d) Partially True

Explanation:

As per the metals, in the reactivity series, silver is less reactive than copper, so there will be no displacement reaction between silver and copper. Hence copper sulphate solution can be stored in a silver container and Not Lead Cause It Can React With It

Answer 2

Copper sulphate solution can be safely kept in a container made of silver and lead. (d) Partially true false​.

• When an aqueous solution is placed in a metal container, then there is a possibility that the metal from the metal container may displace the metal from the aqueous solution.
• To prevent this from happening, the aqueous solution of metal should be placed in the container of a less reactive metal so as to prevent the displacement reaction.
• The activity series is - K > Na > Ca > Mg > Al > Zn > Fe > Pb > Cu > Hg > Ag > Au.
• As we can see, copper is more reactive than lead. Hence, lead will displace copper from copper sulphate solution. Thus, copper sulphate solution CANNOT be safely kept in a container made of lead.
• However, silver is less reactive than copper, so silver cannot displace copper from copper sulphate solution. Thus, copper sulphate solution CAN be safely kept in a container made of silver.