Minerals and Rocks
Minerals and Rocks, Land forms, Geography, XI
Questions
The elements in the earth’s crust are rarely found exclusively but are usually combined with other elements to make various substances, which are recognised as minerals but sometimes single element minerals are also found. Which of these is a single element mineral?
- Feldspar
- Olivine
- Mica
- Pyroxene
- Graphite
Which of the following is correct?
- Feldspar has light cream to salmon pink colour and is used in ceramics and glass making.
- Pyroxene is white or colourless and used in radio and radar, and is one of the most important components of granite.
- Quartz is commonly found in meteorites and is in green or black in colour.
- Olivine is commonly found in igneous and metamorphic rocks, and is used in electrical instruments.
- Mica is in green or black colour, and is used in asbestos industry.
Which of the following is incorrect?
- The basic source of all minerals is the hot magma in the interior of the earth.
- When magma cools, crystals of minerals appear and a systematic series of minerals are formed in sequence to solidify, so as to form rocks.
- A mineral is a naturally occurring organic substance, having an orderly atomic structure and a definite chemical composition and physical properties.
- All of the above statements are incorrect.
- None of the above statements is incorrect.
Which of the following statements is/are correct?
a. The minerals that contain metal content are called metallic minerals.
b. Iron and other metals often mixed with iron to form various kinds of steel are called ferrous metals.
c. Platinum is a precious metal.
- Only a
- Only b
- Only c
- Only a and c
- All of these
Cement is a mixture of
- metallic minerals
- ferrous metals
- non ferrous metals
- non metallic minerals
- none of these
Which of the following has the maximum resistance to being scratched?
- Talc
- Gypsum
- Capsite
- Feldspur
- Topaz
Which of the following types of rocks are formed by the process of lithification?
- Igneous rocks
- Sedimentary rocks
- Metamorphic rocks
- All types of rocks
- Sedimentary and Igneous rocks
Which of the following sets comprises of non ferrous metals?
- Copper, lead, zinc, tin, aluminium
- Copper, lead, sulphur, tin, aluminium
- Copper, lead, zinc, phosphate, aluminium
- Copper, sulphur, phosphate, tin, aluminium
- Copper, lead, sulfur, phosphate, nitrate
Which of the following minerals is used in making jewellery?
- Olivine
- Mica
- Amphibole
- Feldspur
- Pyroxene
Which of the following is not a sedimentary rock?
- Geyserite
- Halite
- Coal
- Basalt
- Shale
Which of the following is a process by which already consolidated rocks undergo recrystallisation and reorganisation of materials within original rocks?
- Metamorphism
- Banding
- Foliation
- Lithification
- Transformation
An arrangement of layers or lines in minerals or grains in metamorphic rocks is called as
- dynamic metamorphism
- thermal metamorphsim
- foliation
- banding
- lithification
Match the column I sedimentary rock with column II mode of formation:
| Column I | Column II |
| 1. Sandstone | a. Chemically formed |
| 2. Chalk | b. Mechanically formed |
| 3. Potash | c. Organically formed |
- 1 - a, 2 - b, 3 - c
- 1 - b, 2 - c, 3 - a
- 1 - c, 2 - b, 3 - a
- 1 - a, 2 - c, 3 - b
- 1 - c, 2 - a, 3 - b
Which of the following statements about the nature of minerals is incorrect?
- Some minerals have characteristic colour determined by their molecular structure and some minerals are coloured by impurities.
- Lustre is the appearance of a material without regard to its colour.
- External crystal form of a mineral is determined by the internal arrangement of the molecules.
- Cleavage is quality of a mineral with the internal molecular arrangement, so complex that there are no planes of molecules and the crystal will break in an irregular manner.
- Hardness of a mineral is measured by its relative resistance to being scratched.
Which of the following is a science of rocks?
- Pedology
- Seismology
- Petrology
- Archaeology
- Geology