1. Can we store copper sulphate solution in an iron container?
Answer: No, we cannot store copper sulphate solution in an iron container.
This is because iron is more reactive than copper according to the reactivity series. When iron comes in contact with copper sulphate solution, a displacement reaction occurs. Iron displaces copper from the solution, forming iron sulphate and depositing copper metal. This reaction would corrode the iron container and contaminate the solution.
2. Anuj got an electric shock when he inserted a wooden pencil in an electric socket. Can you explain the reason for the electric shock as wood is an insulator?
Answer: Although the outer part of a pencil is made of wood (an insulator), the core of a pencil is made of graphite, which is a form of carbon. Graphite is a good conductor of electricity. When Anuj inserted the pencil into the socket, the graphite core came into contact with the live parts of the socket, creating a path for electric current to flow through his body, resulting in an electric shock.