Answer:
Cr
Explanation:
Cr will displace Sn from compound because Cr is higher than Sn in the electrochemical series of metals
Very body wants to achieve equilibrium so charge moves from high concentration to low concentrations.
#2 balloon has more number of negative charge and same number of +ve charge.
when both the balloons will be touched with each other then charge from balloon 2 will move towards balloon 1
If #1 balloon has more -ve charge then charge will flow from #1 towards #2 balloon. when they will be touched together.