Rust is a general term for a series of iron oxides, usually, red oxides, formed by the reaction of iron with oxygen in the presence of water or air moisture. Rusting is the common term for corrosion of iron and its alloys, such as steel. Many other metals undergo similar corrosion, but the resulting oxides are not commonly called rust.

An iron nail is immersed in a solution of copper sulphate of copper sulphate and when it is removed from the solution, it is coated with a layer of copper metal. After that a different iron nail is immersed in a solution of zinc nitrate and removed, this nail rusted just as rapidly as a …

Assertion :The colour of copper sulphate solution change when an iron nail is dipped in it. Reason: When an iron nail is placed in a copper sulphate solution, iron displaces copper from copper sulphate solution forming iron sulphate.

Iron nails lose their shiny appearance because an insoluble layer of copper is formed on the nails, Meanwhile, the solution, C u S O 4 loses its blue color because of the formation of F e S O 4. This reaction is called displacement reaction in which the reactive element Iron, Fe has displaced less reactive Copper from its solution, The chemical ...

When irons nails are placed in copper sulphate solution, the blue colour of copper sulphate solution fades gradually and red-brown copper metal is formed.

Blue colour of copper sulphate solution changes into green colour & then iron nail acquires a brownish look. This is because that iron is more reactive than copper. F e + C u S O 4 → F e S O 4 + C u In this reaction, iron displaces copper from C u S O 4 solution.

An iron nail sinks in water while a flat cup floats. This is because the nail is unable to displace the amount of water equivalent to its weight. Similarly, an empty plastic bottle floats on water. However, when you fill it up with water, the bottle sinks. This is because it is unable to displace that much volume of water.

Observation: We will observe that some materials like Iron nail, Sewing needle, and coin are attracted towards a magnet while the other substances like a brass screw, Aluminium foil, plastic comb etc do not get attracted towards a magnet. 1. Magnetic Materials. Those materials which are attracted b a magnet are magnetic materials.

Assertion (A) The ships of iron and the boats of wood float in water but the nails iron sink. Reason (R) The special design and shape of the ship and the boat through which weight of displaced water are more than the weight of the ship and boat, due to which more force of buoyancy becomes operative and the ships or boats floats.

Radha wraps insulated copper wires onto an iron nail. To the ends of the wire, she connects a cell and a switch. When she switches-off the switch, she observes that the pins cling to the nail. Explain the reason for her observation. Solution When Radha closes the switch, electric current flows through the wire.