The correct option is 1 and 3 only.
Explanation
Mica is a non-metallic mineral composed of a series of plates or leaves. It is highly valued in the electrical and electronics industry due to its excellent di-electric strength, low power loss factor, insulating properties, and resistance to high voltage.
Statement-wise Analysis:
- Statement 1 is Correct: Mica is widely distributed in the Earth's crust and is found in igneous, sedimentary, and metamorphic rocks. Commercially important mica deposits are typically associated with pegmatites (igneous rocks) and schists (metamorphic rocks).
- Statement 2 is Incorrect: Mica is not characterized by hardness that prevents splitting; rather, it is defined by its perfect basal cleavage. This property allows it to split very easily into extremely thin, tough, and flexible sheets. A few centimeters of mica can contain thousands of such sheets.
- Statement 3 is Correct: India has traditionally been the world's largest producer and exporter of sheet mica. Major deposits are located in the northern edge of the Chota Nagpur plateau (Jharkhand), the Nellore belt (Andhra Pradesh), and Rajasthan.
Key Takeaway: Mica is a silicate mineral found primarily in igneous and metamorphic rocks, distinguished by its ability to split into thin sheets (perfect cleavage) and its status as a superior insulator, with India being a dominant player in its global export.