A clean copper wire is placed in a beaker containing silver nitrate solution
CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Reactions and Equations · Chemical Reactions and Equations
Problem
A clean copper wire is placed in a beaker containing 0.10M silver nitrate solution. After several minutes, which observation would provide the strongest evidence that a chemical change has taken place?
(a) The solution gradually turns blue while silver-gray crystals grow on the surface of the copper wire.
(b) The copper wire feels slightly warmer, but both the wire and the solution remain clear and unchanged.
(c) Minute bubbles of gas form on the copper wire and rise through the otherwise colourless solution.
(d) The copper wire becomes brighter and more lustrous, yet the solution stays colourless and transparent.