Correct Option
The correct option is (a) 1 only.
Explanation
Magnets are substances that possess the property of attracting iron, nickel, and cobalt. They are broadly classified into natural magnets and artificial magnets based on their origin and method of formation.
Statement-wise Analysis
- Statement 1 is Correct: Magnetite is a naturally occurring mineral and one of the main iron ores. It possesses natural magnetic properties and has the ability to attract iron. Rocks containing this mineral are often referred to as natural magnets.
- Statement 2 is Incorrect: The name 'magnetite' is not derived from its chemical composition. Historical accounts suggest it was named after a shepherd named Magnes, who discovered the stone when the iron tip of his stick got stuck to a rock. Alternatively, it is believed to be named after Magnesia, a region in ancient Greece where these stones were found in abundance.
- Statement 3 is Incorrect: Magnetite is a natural magnet, not an artificial one. Artificial magnets are man-made magnets created by magnetizing pieces of iron, steel, or other alloys using specific methods (such as stroking with a magnet or using electric current).
Key Takeaway
Magnetite (Lodestone) is a natural magnet discovered in ancient times, whereas artificial magnets are human-made devices created from ferromagnetic materials.