The correct option is (c).
Explanation
Materials are classified into magnetic and non-magnetic based on their response to an external magnetic field. Magnetic materials are those that are attracted to a magnet, whereas non-magnetic materials do not show such attraction.
Statement-wise Analysis
- Statement 1 is Incorrect. Soil is a heterogeneous mixture that often contains particles of various minerals. It frequently includes traces of iron or magnetic minerals such as magnetite. Therefore, it is factually incorrect to state that all materials found in soil are non-magnetic.
- Statement 2 is Correct. By definition, a material is termed magnetic if it is attracted by a magnet. These materials can be magnetized and are capable of being attracted to the poles of a magnet.
- Statement 3 is Correct. Iron, nickel, and cobalt are the most common examples of magnetic materials (specifically ferromagnetic materials). They are strongly attracted to magnets and can be permanently magnetized.
Key Takeaway
Magnetic materials (e.g., Iron, Nickel, Cobalt) are attracted to magnets, while non-magnetic materials (e.g., plastic, wood, rubber) are not. Soil is a mixture that may contain magnetic particles.