Q1. Which of the following is not a type of iron ore?
Explanation
Lignite is not an iron ore; it is a low-grade form of coal, commonly called brown coal. Siderite is an iron carbonate ore and is included among recognised iron ores. Limonite is a hydrated iron oxide ore and is also a source of iron. Magnetite is a major iron ore with high iron content and strong magnetic properties. Since the question asks for the item that is not a type of iron ore, lignite is the correct answer according to the official key.
