AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) Copper is more reactive than silver.
Copper displaces silver from silver nitrate solution because it is more reactive, forming copper nitrate (solution turns blue) and silver deposits on the wire.
Source: Chapter 3, Section 3.2.4 & 3.2.5 (Reactivity Series)
In the reactivity series, copper is placed above silver, meaning copper is more reactive. A more reactive metal displaces a less reactive metal from its salt solution — this is a displacement reaction. The blue colour of the solution is due to Cu²⁺ ions (copper nitrate formed), and the shiny deposit is silver metal. Options A and C say the opposite and are wrong; D is incorrect as the metals clearly differ in reactivity.