Minerals and En...

Which of the given statements about limestone is/are correct?

A. Limestone is formed by the decomposition of a wide variety of rocks.
B. Limestone is the basic raw material for the cement industry.
C. Limestone splits easily into thin sheets.

Mica is used in/for which of the following?

Which of the following is not a sedimentary mineral?

Manganese is mainly used in the steel industry and in the ferro-manganese alloy. It is also used in manufacturing bleaching powder, insecticides and paints. Which state of India is the largest producer of manganese ores?

Ratna loves to brush her teeth with the toothpaste that sparkles. Which of the following minerals gives this sparkle to the toothpaste?

Sometimes surface rocks decompose and soluble material is removed from them in the course of weathering. The residual mass of weathered rocks that remains contains ores. Which of the following minerals is extracted from such weathered mass of rocks?

Which of the following statements is/are correct?

a. Mica is made up of a series of plates or leaves. It splits easily into thin sheets.
b. Its deposits are found in the northern edge of the Chota Nagpur plateau. Koderma Gaya – Hazaribagh belt of Jharkhand is the leading producer.
c. Mica has excellent dielectric strength, low power loss factor, insulating properties and resistance to high voltage.

Which of the following statements is/are correct?

a. Metals are extracted from the minerals embedded in the rocks after proper refinement.
b. Limestone is a rock that is made of a single mineral.
c. Over 2000 minerals are abundantly found in most of the rocks.

Which of the following statements is/are correct?

a. Magnetite is the finest iron ore with a very high content of iron up to 70 per cent.
b. Magnetite has excellent magnetic qualities.
c. Magnetite is very valuable in the electrical industry.

Which of the following statements is/are correct?

a. Ferrous minerals account for about three-fourths of the total value of the production of metallic minerals.
b. Ferrous minerals provide a strong base for the development of metallurgical industries in India.
c. India imports substantial quantities of ferrous minerals from South America and Russia.

Minerals occur in beds or layers in which of the following types of rocks?

a. Sedimentary
b. Metamorphic
c. Igneous

Which of the following is not a reserve of natural gas in India?

India is critically deficient in the reserves and production of copper. In which of the following mines is copper found?

a. Balaghat mines in Madhya Pradesh
b. Singhbhum district of Jharkhand
c. Panchpatmali deposits in Koraput district of Orissa
d. Nellore mines of Andhra Pradesh

Which of the following statements is/are correct?

a. Extraction of minerals in India is possible only after obtaining due permission from the government.
b. Mining in which minerals are extracted in a long narrow tunnel is known as rat hole mining.
c. Coal is the only mineral in India that is owned by individuals or communities.

Uranium and thorium are used for generating atomic or nuclear power. Where can these minerals be found in India?

a. Jharkhand
b. Rajasthan
c. Kerala
d. Assam