General Awareness · Geography

Minerals and Ores

1,185 Questions

Minerals and ores encompass the extraction, identification, and economic significance of naturally occurring crystalline substances. Topics cover specific ores like cinnabar and bauxite, alongside global mineral resource distribution. Candidates preparing for general awareness and geography sections should review these questions to master regional and global mineral reserves.

Ore identificationMineral extractionGlobal mineral reservesIndustrial minerals

Minerals and Ores Questions

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Statement: Valuable gemstones such as rubies and sapphire contain aluminium oxides along with traces of transition metals as impurities.


State whether the given statement is true or false.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sapphire is a gemstone, a variety of the mineral corundum, an aluminium oxide. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colours.


The only colour which sapphire cannot be is red – as red-coloured corundum is called ruby. Rubies are crystalline forms of aluminium oxide, which are red due to the presence of chromium as an impurity.

A rare variety of natural sapphire, known as colour-change sapphire, exhibits different colours in a different light.

The colour-change effect is caused by the interaction of the sapphire, which absorbs specific wavelengths of light, and the light source, whose spectral output varies depending upon the illuminant.
Transition-metal impurities in the sapphire, such as chromium and vanadium, are responsible for the colour change.

Hence, the given statement is $\text{true}$

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

The material mixed before ore is subjected for smelting in the extraction of iron are:

  1. cake and silica

  2. coke and limestone

  3. limestone and silica

  4. coke, limestone and silika
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Smelting is a form of extraction metallurgy. Its main purpose is to get pure metal from th ore. Coke and limestone are added. Coke acts as an reducing agent and limestone acts as a flux. Concentrated ore of iron i.e. haemetite is used.

Multiple choice history what is history? historiography in the west historiography: development in the west historiography: indian tradition

Consider the following pairs:

$1$. Bauxite Ferrous mineral
$2$. Nickel Non-ferrous mineral
$3$. Mica Non-metallic mineral

Which of the following pairs is/are correctly matched?

  1. $1$ only
  2. $1$ and $2$ only
  3. $2$ only
  4. $3$ only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bauxite: Non-ferrous mineral because it does not have iron content.
Nickel: Ferrous mineral because it contains iron content.
Mica: Non-metallic mineral because it does not contain any metal.

Multiple choice geography secondary sector : industry generation of electricity exploration and conservation of minerals irrigation and power

What is the dereliction of mines?

  1. Abandoning of the mines

  2. Continued use of mines

  3. Partial suspension of mining activities

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dereliction in the context of mining refers to the abandonment of mine sites after operations have ceased. This often leaves the land in a degraded state without proper reclamation.

Multiple choice commercial studies striving for a better environment unequal distribution of resources protecting our environment rules are for everyone

Which one of the following resources is least developed due to economic factors as well as inadequate knowedge?

  1. ocean resource

  2. mineral resource

  3. forest resource

  4. soil resource
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ocean resources are often considered the least developed due to the high costs of exploration, technological challenges, and the lack of comprehensive knowledge about deep-sea environments.

Multiple choice chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

The non-metallic mineral among the following is :

  1. graphite

  2. chromite

  3. bauxite

  4. tungsten
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chromite is an ore of chromium, bauxite is an ore of aluminium and tungston are metallic in nature while graphite is an allotrope of carbon and a carbonaceous compound. It is a very soft allotrope of carbon while other allotrope of carbon diamond is the hardest known element on this earth. This is because of the chemical structure of graphite which shows slippery nature of layers of carbon and presence of loose electrons.

Multiple choice economics environment and sustainable development need for sustainable development environmental economics sustainable development

What are "conflict commodities"?

  1. Minerals mined in naxalite-infested areas

  2. International trade in arms

  3. Valuable minerals which are claimed by warring groups in civil war-torn countries

  4. Narcotics supplied by international drug cartels
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Conflict commodities are natural resources whose extraction and trade are used to finance armed conflict and human rights abuses.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which one of the following minerals is contained in the Monazite sand?

  1. Oil

  2. Uranium

  3. Thorium

  4. Coal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Monazite is a reddish brown-phosphate mineral containing rare-earth metals.

Thorium is contained in the Monazite sand. This mineral is mined from the placer deposits.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which one of the following is an important ferro-alloy?

  1. Manganese ore

  2. Bauxite ore

  3. Iron ore

  4. Mica
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ferroalloys are alloys of iron that contain one or more other chemical elements. Manganese occurs as silvery grey in colour and is very hard and brittle in nature. It is always available in combination with iron, laterite and other minerals. Manganese in alloy form is an essential input in steel making and is one of the most important metals in an industrial economy

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which among the following is metallic mineral?

  1. Copper

  2. Mica

  3. Diamond

  4. Limestone
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Copper is known for its metallic reddish-brown colour. Ornaments, coins, and statues have been fashioned from Copper since ancient times. Its distinct colour and availability throughout history have afforded it great significance.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

The non-metallic mineral among the following is ______.

  1. Graphite

  2. Chromite

  3. Bauxite

  4. Tungston
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  1. Nonmetallic minerals are a special group of chemical elements from which no new product can be generated if they are melted.
  2.  Nonmetallic minerals are, for example, sand, gravel, limestone, clay,graphite.
  3. Such materials lack metallic characteristics like good electric and thermic conductivity, luster, rigor, and malleability; they are, however, essential for many industries.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which one of the following minerals is contained in the monazite sand?

  1. Oil

  2. Uranium

  3. Thorium

  4. Coal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  1. Monazite is reddish brown phosphate mineral, containing rare Earth metals. It is an important ore for thorium, lanthanum, cerium.
  2. It is found in India, Madagascar, South Africa, with large deposit of monazite sand.
  3. It is from German word "monazit" meaning solitary.
Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Column 1 is the list of minerals and Column II have information related to those minerals :


  Column-I     Column-II     
1   Copper (i)  formed when dead plant matter decays into peat
 2  Aluminium (ii)  found in sedimentary layer   
 3  Coal (iii)  makes up 8% of Earth's crust
4   Platinum (iv)   one of the least reactive metal

Which one of the following is correctly matched set?

  1. 1-ii, 2-iii, 3-iv, 4-i

  2. 1-iv,2-ii,3-i,4-iii

  3. 1-iii, 2-i,3-iv,4-ii

  4. 1-ii, 2-iii, 3-i, 4-iv
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

     Copper:

    The orebodies are formed in hydrothermal veins that are born in underground magma chambers far below the deposit itself. The high temperatures of volcanic magma creates hydrothermal veins, allowing some of the heat to escape near the upper layers of the Earth’s crust.

    This is why copper is often found in the sedimentary layer, where sand and mud are compressed until they form a layer of sedimentary rock on the surface of the earth. Copper ore gets trapped in oxidized zones within these types of rocks.

     

     

     

    Aluminium: 

    | Element name | Symbol | Percentage by weight of the Earth’s crust | | --- | --- | --- | | Oxygen | O | 47 | | Silicon | Si | 28 | | Aluminium | Al | 8 | | Iron | Fe | 5 | | Calcium | Ca | 3.5 | | Sodium | Na | 3 | | Potassium | K | 2.5 | | Magnesium | Mg | 2 | | All other elements |   | 1 |

     

    Coal: The plant matter becomes buried, and are no longer exposed to air. Anaerobic bacteria then starts to decompose the material. Burial and accumulation can occur for several thousands of years, producing several meters of partially decayed plant matter known as peat

     

    Platinum:

    The least reactive metals would be Platinum, Gold, Palladium, Osmium and Silver and in the decreasing order. The inertness of the metals is due to the electron configuration in the orbitals.